Quizbank/College Physics/II T4study

1. Which lens has the shorter focal length?

___ a)

___ b)

___ c) They have the same focal lengh.

2. If this represents the eye looking at an object, where is this object?

___ a) at infinity

___ b) One focal length in front of the eye

___ c) Two (of the other answers) are true

___ d) very far away

___ e) directly in front of the eye (almost touching)

3. After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

___ a) true

___ b) false

4. Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?

___ a)

___ b)

___ c)

5.

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

___ a) how a nearsighted person might see a distant object

___ b) how a farsighted person might see an object that is too close for comfort

___ c) how a farsighted person might see a distant object

___ d) how a nearsighted person might see an object that is too close for comfort

6.

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

___ a) how a farsighted person might see a distant object

___ b) how a nearsighted person might see an object that is too close for comfort

___ c) how a nearsighted person might see a distant object

___ d) how a farsighted person might see an object that is too close for comfort

7. In optics, normal means

___ a) perpendicular to the surface

___ b) to the right of the optical axis

___ c) parallel to the surface

___ d) to the left of the optical axis

8. The law of reflection applies to

___ a) telescopes but not microscopes

___ b) only light in a vacuum

___ c) curved surfaces

___ d) flat surfaces

___ e) both flat and curved surfaces

9. When light passes from air to glass

___ a) it bends away from the normal

___ b) the frequency decreases

___ c) it does not bend

___ d) the frequency increases

___ e) it bends towards the normal

10. When light passes from glass to air

___ a) it bends towards the normal

___ b) the frequency decreases

___ c) it does not bend

___ d) the frequency increases

___ e) it bends away from the normal

11. An important principle that allows fiber optics to work is

___ a) total internal reflection

___ b) partial internal absorption

___ c) the invariance of the speed of light

___ d) total external refraction

___ e) the Doppler shift

12. The focal point is where

___ a) rays meet whenever they pass through a lens

___ b) rays meet whenever they are forming an image

___ c) the center of the lens

___ d) rays meet if they were parallel to the optical axis before striking a lens

___ e) rays meet if they are parallel to each other

13. An object is placed 6.3 cm to the left of a diverging lens with a focal length of 8.9 cm. How far is the image from the lens?

___a) 1.17 x 10⁰ cm

___b) 2.07 x 10⁰ cm

___c) 3.69 x 10⁰ cm

___d) 6.56 x 10⁰ cm

___e) 1.17 x 10¹ cm

14. An object is placed 3.55 cm to the left of a converging lens with a focal length of 6.8 cm. How far is the image from the lens?

___a) 4.18 x 10⁰ cm

___b) 7.43 x 10⁰ cm

___c) 1.32 x 10¹ cm

___d) 2.35 x 10¹ cm

___e) 4.18 x 10¹ cm

15. An object of height 0.67 cm is placed 107 cm behind a diverging lens with a focal length of 70 cm. What is the height of the image?

___a) 2.65 x 10^-1 cm

___b) 3.18 x 10^-1 cm

___c) 3.82 x 10^-1 cm

___d) 4.58 x 10^-1 cm

___e) 5.49 x 10^-1 cm

16. An object is placed 12.1 cm to the left of a diverging lens with a focal length of 16.9 cm. On the side, at a distance of 6.7 cm from the diverging lens is a converging lens with focal length equal to 4 cm. How far is the final image from the converging lens?

___a) 5.64 x 10⁰ cm

___b) 1.78 x 10¹ cm

___c) 5.64 x 10¹ cm

___d) 1.78 x 10² cm

___e) 5.64 x 10² cm

17. If the electron behaved as a classical (non-quantum) particle and NOT somehow connected to a spring inside the metal, then one would expect that photoelectrons would be emitted _______

___ a) at a specific frequency

___ b) above a threshold intensity

___ c) above a threshold wavelength

___ d) above a threshold frequency

18. If the electron behaved as a classical (non-quantum) particle and the electron was somehow connected to a spring inside the metal, then one would expect that photoelectrons would be emitted _______

___ a) at a specific frequency

___ b) above a threshold intensity

___ c) above a thresholdfrequency

___ d) above a threshold wavelength

19. In the photoelectric effect, how was the maximum kinetic energy measured?

___ a) by measuring the voltage required to prevent the electrons from passing between the two electrodes.

___ b) by measuring the wavelength of the light

___ c) by measuring the distance between the electrodes

20. Excepting cases where where quantum jumps in energy are induced in another object (i.e., using only the uncertainty principle), which would NOT put a classical particle into the quantum regime?

___ a) low speed

___ b) low mass

___ c) high speed

___ d) confinement to a small space

21. How does the Bohr atom differ from Newton's theory of planetary orbits?

___ a) The force between proton and electron is not attractive for the atom, but it is for planets and the sun.

___ b) electrons make elliptical orbits while planets make circular orbits

___ c) planets make elliptical orbits while the electron makes circular orbits

___ d) The force between planets and the sun is not attractive for the atom, but it is for proton and electron.

22. What are the units of Plank's constant?

___ a) energy x time

___ b) mass x velocity x distance

___ c) none of the above

___ d) momentum x distance

___ e) all of the above

23. What are the units of Plank's constant?

___ a) all of the above

___ b) momentum x distance x mass

___ c) none of the above

___ d) mass x velocity

___ e) energy x time

24. How would you describe Old Quantum Theory

___ a) complete but not self-consistent

___ b) neither complete nor self-consistent

___ c) complete and self-consistent

___ d) self-consistent but not complete

25. The first paper that introduced quantum mechanics was the study of

___ a) protons

___ b) energy

___ c) light

___ d) electrons

26. What are examples of energy?

___ a)

___ b) all of the above

___ c) heat

___ d) mgh where m is mass, g is gravity, and h is height

27. What are examples of energy?

___ a) all of the above

___ b)

___ c) heat

___ d) momentum

28. What was Plank's understanding of the significance of his work on blackbody radiation?

___ a) he knew it would someday win him a Nobel prize

___ b) he eventually convinced his dissertation committee that the theory was correct

___ c) the thought it was some sort of mathematical trick

___ d) he was afraid to publish it for fear of losing his reputation

29. What was "spooky" about Taylor's 1909 experiment with wave interference?

___ a) The light was so dim that the photoelectric effect couldn't occur

___ b) The light was so dim that only one photon at a time was near the slits.

___ c) The light was dim, but it didn't matter because he was blind.

___ d) The interference pattern mysteriously disappeared.

30. Approximately how often does a supernovae occur in a typical galaxy?

___ a) once every 50 years

___ b) once every 5 years

___ c) once a 5 months

31. If a star were rushing towards Earth at a high speed

___ a) there would be a blue shift in the spectral lines

___ b) there would be a red shift in the spectral lines

___ c) there would be no shift in the spectral lines

32. An example of a standard candle is

___ a) a supernova in a distant galaxy

___ b) all of these are standard candles

___ c) any part of the nighttime sky that is dark

___ d) any part of the nighttime sky that is giving off light

33. If a galaxy that is 10 Mpc away is receding at 700km/s, how far would a galaxy be receding if it were 20 Mpc away?

___ a) 350km/s

___ b) 1400km/s

___ c) 700km/s

34. The "apparent" magnitude of a star is

___ a) How bright it would be if it were not receding due to Hubble expansion

___ b) How bright it would be if you were exactly one light year away

___ c) How bright it is as viewed from Earth

35. In the essay "Why the sky is dark at night", a graph of velocity versus distance is shown. What is odd about those galaxies in the Virgo cluster (circled in the graph)?

___ a) they are not receding away from us

___ b) they have a wide variety of speeds

___ c) the cluster is close to us

___ d) they all have nearly the same speed

36. Why was it important to observe supernovae in galaxies that are close to us?

___ a) they have less of a red-shift, and interstellar gas absorbs red light

___ b) because supernovea are impossible to see in distant galaxies

___ c) we have other ways of knowing the distances to the nearby galaxies; this gives us the opportunity to study supernovae of known distance and ascertain their absolute magnitude.

___ d) it is easier to measure the doppler shift, and that is not always easy to measure.

37. What if clouds of dust blocked the light from distant stars? Could that allow for an infinite and static universe?

___ a) No, there are clouds, but they remain too cold to resolve the paradox

___ b) No, the clouds would get hot

___ c) No, if there were clouds, we wouldn't see the distant galaxies

___ d) Yes, that is an actively pursued hypothesis

1. Which lens has the shorter focal length?

- a)

+ b)

- c) They have the same focal lengh.

2. If this represents the eye looking at an object, where is this object?

- a) at infinity

- b) One focal length in front of the eye

+ c) Two (of the other answers) are true

- d) very far away

- e) directly in front of the eye (almost touching)

3. After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

- a) true

+ b) false

4. Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?

- a)

+ b)

- c)

5.

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

+ a) how a nearsighted person might see a distant object

- b) how a farsighted person might see an object that is too close for comfort

- c) how a farsighted person might see a distant object

- d) how a nearsighted person might see an object that is too close for comfort

6.

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

- a) how a farsighted person might see a distant object

- b) how a nearsighted person might see an object that is too close for comfort

- c) how a nearsighted person might see a distant object

+ d) how a farsighted person might see an object that is too close for comfort

7. In optics, normal means

+ a) perpendicular to the surface

- b) to the right of the optical axis

- c) parallel to the surface

- d) to the left of the optical axis

8. The law of reflection applies to

- a) telescopes but not microscopes

- b) only light in a vacuum

- c) curved surfaces

- d) flat surfaces

+ e) both flat and curved surfaces

9. When light passes from air to glass

- a) it bends away from the normal

- b) the frequency decreases

- c) it does not bend

- d) the frequency increases

+ e) it bends towards the normal

10. When light passes from glass to air

- a) it bends towards the normal

- b) the frequency decreases

- c) it does not bend

- d) the frequency increases

+ e) it bends away from the normal

11. An important principle that allows fiber optics to work is

+ a) total internal reflection

- b) partial internal absorption

- c) the invariance of the speed of light

- d) total external refraction

- e) the Doppler shift

12. The focal point is where

- a) rays meet whenever they pass through a lens

- b) rays meet whenever they are forming an image

- c) the center of the lens

+ d) rays meet if they were parallel to the optical axis before striking a lens

- e) rays meet if they are parallel to each other

13. An object is placed 6.3 cm to the left of a diverging lens with a focal length of 8.9 cm. How far is the image from the lens?

-a) 1.17 x 10⁰ cm

-b) 2.07 x 10⁰ cm

+c) 3.69 x 10⁰ cm

-d) 6.56 x 10⁰ cm

-e) 1.17 x 10¹ cm

14. An object is placed 3.55 cm to the left of a converging lens with a focal length of 6.8 cm. How far is the image from the lens?

-a) 4.18 x 10⁰ cm

+b) 7.43 x 10⁰ cm

-c) 1.32 x 10¹ cm

-d) 2.35 x 10¹ cm

-e) 4.18 x 10¹ cm

15. An object of height 0.67 cm is placed 107 cm behind a diverging lens with a focal length of 70 cm. What is the height of the image?

+a) 2.65 x 10^-1 cm

-b) 3.18 x 10^-1 cm

-c) 3.82 x 10^-1 cm

-d) 4.58 x 10^-1 cm

-e) 5.49 x 10^-1 cm

16. An object is placed 12.1 cm to the left of a diverging lens with a focal length of 16.9 cm. On the side, at a distance of 6.7 cm from the diverging lens is a converging lens with focal length equal to 4 cm. How far is the final image from the converging lens?

+a) 5.64 x 10⁰ cm

-b) 1.78 x 10¹ cm

-c) 5.64 x 10¹ cm

-d) 1.78 x 10² cm

-e) 5.64 x 10² cm

17. If the electron behaved as a classical (non-quantum) particle and NOT somehow connected to a spring inside the metal, then one would expect that photoelectrons would be emitted _______

- a) at a specific frequency

+ b) above a threshold intensity

- c) above a threshold wavelength

- d) above a threshold frequency

18. If the electron behaved as a classical (non-quantum) particle and the electron was somehow connected to a spring inside the metal, then one would expect that photoelectrons would be emitted _______

+ a) at a specific frequency

- b) above a threshold intensity

- c) above a thresholdfrequency

- d) above a threshold wavelength

19. In the photoelectric effect, how was the maximum kinetic energy measured?

+ a) by measuring the voltage required to prevent the electrons from passing between the two electrodes.

- b) by measuring the wavelength of the light

- c) by measuring the distance between the electrodes

20. Excepting cases where where quantum jumps in energy are induced in another object (i.e., using only the uncertainty principle), which would NOT put a classical particle into the quantum regime?

- a) low speed

- b) low mass

+ c) high speed

- d) confinement to a small space

21. How does the Bohr atom differ from Newton's theory of planetary orbits?

- a) The force between proton and electron is not attractive for the atom, but it is for planets and the sun.

- b) electrons make elliptical orbits while planets make circular orbits

+ c) planets make elliptical orbits while the electron makes circular orbits

- d) The force between planets and the sun is not attractive for the atom, but it is for proton and electron.

22. What are the units of Plank's constant?

- a) energy x time

- b) mass x velocity x distance

- c) none of the above

- d) momentum x distance

+ e) all of the above

23. What are the units of Plank's constant?

+ a) all of the above

- b) momentum x distance x mass

- c) none of the above

- d) mass x velocity

- e) energy x time

24. How would you describe Old Quantum Theory

- a) complete but not self-consistent

+ b) neither complete nor self-consistent

- c) complete and self-consistent

- d) self-consistent but not complete

25. The first paper that introduced quantum mechanics was the study of

- a) protons

- b) energy

+ c) light

- d) electrons

26. What are examples of energy?

- a)

+ b) all of the above

- c) heat

- d) mgh where m is mass, g is gravity, and h is height

27. What are examples of energy?

+ a) all of the above

- b)

- c) heat

- d) momentum

28. What was Plank's understanding of the significance of his work on blackbody radiation?

- a) he knew it would someday win him a Nobel prize

- b) he eventually convinced his dissertation committee that the theory was correct

+ c) the thought it was some sort of mathematical trick

- d) he was afraid to publish it for fear of losing his reputation

29. What was "spooky" about Taylor's 1909 experiment with wave interference?

- a) The light was so dim that the photoelectric effect couldn't occur

+ b) The light was so dim that only one photon at a time was near the slits.

- c) The light was dim, but it didn't matter because he was blind.

- d) The interference pattern mysteriously disappeared.

30. Approximately how often does a supernovae occur in a typical galaxy?

+ a) once every 50 years

- b) once every 5 years

- c) once a 5 months

31. If a star were rushing towards Earth at a high speed

+ a) there would be a blue shift in the spectral lines

- b) there would be a red shift in the spectral lines

- c) there would be no shift in the spectral lines

32. An example of a standard candle is

+ a) a supernova in a distant galaxy

- b) all of these are standard candles

- c) any part of the nighttime sky that is dark

- d) any part of the nighttime sky that is giving off light

33. If a galaxy that is 10 Mpc away is receding at 700km/s, how far would a galaxy be receding if it were 20 Mpc away?

- a) 350km/s

+ b) 1400km/s

- c) 700km/s

34. The "apparent" magnitude of a star is

- a) How bright it would be if it were not receding due to Hubble expansion

- b) How bright it would be if you were exactly one light year away

+ c) How bright it is as viewed from Earth

35. In the essay "Why the sky is dark at night", a graph of velocity versus distance is shown. What is odd about those galaxies in the Virgo cluster (circled in the graph)?

- a) they are not receding away from us

+ b) they have a wide variety of speeds

- c) the cluster is close to us

- d) they all have nearly the same speed

36. Why was it important to observe supernovae in galaxies that are close to us?

- a) they have less of a red-shift, and interstellar gas absorbs red light

- b) because supernovea are impossible to see in distant galaxies

+ c) we have other ways of knowing the distances to the nearby galaxies; this gives us the opportunity to study supernovae of known distance and ascertain their absolute magnitude.

- d) it is easier to measure the doppler shift, and that is not always easy to measure.

37. What if clouds of dust blocked the light from distant stars? Could that allow for an infinite and static universe?

- a) No, there are clouds, but they remain too cold to resolve the paradox

+ b) No, the clouds would get hot

- c) No, if there were clouds, we wouldn't see the distant galaxies

- d) Yes, that is an actively pursued hypothesis