Radiation astronomy/Mathematics/Quiz

< Radiation astronomy < Mathematics
Observation of positrons from a terrestrial gamma ray flash is performed by the Fermi gamma ray telescope. Credit: NASA Goddard Space Flight Center.

Radiation mathematics is a lecture and an article about the mathematics of radiation, including radiation as part of radiation astronomy. It is part of the department of astronomy course on the principles of radiation astronomy.

You are free to take this quiz based on radiation mathematics at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, and in the course template. This should give you adequate background to get 100 %.

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Quiz

Point added for a correct answer:   
Points for a wrong answer:
Ignore the questions' coefficients:

1. True or False, ε0 is the electric constant.

TRUE
FALSE

2. The equation for the ion current is likely to include which of the following?

the mass of the electron
the number of electrons
e to the grain capacitance factor
the dust grain radius
a 4πr factor

3. True or False, In the equation for the Larmor radius the charge of the particle is directly proportional to the magnetic field.

TRUE
FALSE

4. Over the last few years, the cold dark

cosmogony has become a model for the formation of structure.

5. Mathematics phenomena associated with radiation astronomy are

orbital theory
flux of annihilation gamma rays
the Rydberg formula
pressure
the local Jeans length
Planck's equation

6. True or False, When solving an equation for a numerical value arrange the coefficients together, the exponentials together, and the dimensions together, to reduce each as needed.

TRUE
FALSE

7. Complete the text:

By setting the first partial of Planck's equation in wavelength form equal to zero, iterative may be used to find pairs of (λ,T) that to some significant digits represent the peak for a given temperature and vice versa.

8. Complete the text:

Match up the type of mathematics with each of the possibilities below:
numbers - A
dimensional analysis - B
arithmetic - C
algebra - D
exponentials - E
probability - F
x2 + y2 = z2 .
PeV .
\phi α 1/σ .
ex + ey .
A(x) = A0 · e-bx
1015 .

9. True or False, log10(100000) = 6.

TRUE
FALSE

10. Complete the text:

Match up the radiation mathematics symbol with the radiation phenomena:
thermal neutron capture rate - A
change in particle diameter - B
power law - C
Planck constant - D
Boltzmann constant - E
electrostatic force - F
Jeans length - G
h .
\lambda_J .
\varphi_n .
F_q .
ax^k .
k_B
C_D .

11. True or False, dex(x) = ex.

TRUE
FALSE

12. Which of the following is radiation mathematics?

the planet Mercury
n0
 → p+
 + e−
 + ν
e
the solar wind
Cepheus X-1
nucleosynthesis near the surface of the Sun
lightning on Jupiter

13. True or False, Gamma radiation which exceeds the neutron binding energy of a nucleus can eject a neutron.

TRUE
FALSE

14. Complete the text:

Match up a likely locational notation with each of the possibilities below:
atomic number - A
atomic weight - B
average hat - C
exponent - D
index - E
pre-coefficient - F
operation - G
range - H
variable - I

15. True or False, e5 x e3 = e8.

TRUE
FALSE

16. Chemistry phenomena associated with metallicity are

blue main sequence stars
[H]
log10(NFe/NH)star
ln(NFe/NH)star
approximately 1.8 percent of M⊙
[Fe/H]

17. True or False, For preliminary calculations, neglecting all fields components higher than quadrupolar, an inhomogenic Hill differential equation can be used as an approximation.

TRUE
FALSE

18. Chemistry phenomena associated with olivines are

substituting values for y from 0 to 1 produce ideal compositions
forsterite Mg2SiO4
atmospheres
fayalite Fe2SiO4
silicates
plastic

19. Mathematical phenomena associated with an exponential decrease are

a positive exponent
a negative absorption coefficient
the number of atoms per cm3
the initial absorption of a monolayer
the absorption cross section in cm2
thinness of material

20. Statistical phenomena associated with the Gaussian function are

√
π
x ε R
the mean
()2
standard deviation

Your score is 0 / 0

Research

Hypothesis:

  1. Much of the mathematics used to describe models in radiation astronomy was developed in physics.

Control groups

This is an image of a Lewis rat. Credit: Charles River Laboratories.

The findings demonstrate a statistically systematic change from the status quo or the control group.

“In the design of experiments, treatments [or special properties or characteristics] are applied to [or observed in] experimental units in the treatment group(s).[1] In comparative experiments, members of the complementary group, the control group, receive either no treatment or a standard treatment.[2]"[3]

Proof of concept

Def. a “short and/or incomplete realization of a certain method or idea to demonstrate its feasibility"[4] is called a proof of concept.

Def. evidence that demonstrates that a concept is possible is called proof of concept.

The proof-of-concept structure consists of

  1. background,
  2. procedures,
  3. findings, and
  4. interpretation.[5]

See also

References

  1. ↑ Klaus Hinkelmann, Oscar Kempthorne (2008). Design and Analysis of Experiments, Volume I: Introduction to Experimental Design (2nd ed.). Wiley. ISBN 978-0-471-72756-9. http://books.google.com/?id=T3wWj2kVYZgC&printsec=frontcover.
  2. ↑ R. A. Bailey (2008). Design of comparative experiments. Cambridge University Press. ISBN 978-0-521-68357-9. http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521683579.
  3. ↑ "Treatment and control groups, In: Wikipedia". San Francisco, California: Wikimedia Foundation, Inc. May 18, 2012. Retrieved 2012-05-31.
  4. ↑ "proof of concept, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. November 10, 2012. Retrieved 2013-01-13.
  5. ↑ Ginger Lehrman and Ian B Hogue, Sarah Palmer, Cheryl Jennings, Celsa A Spina, Ann Wiegand, Alan L Landay, Robert W Coombs, Douglas D Richman, John W Mellors, John M Coffin, Ronald J Bosch, David M Margolis (August 13, 2005). "Depletion of latent HIV-1 infection in vivo: a proof-of-concept study". Lancet 366 (9485): 549-55. doi:10.1016/S0140-6736(05)67098-5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894952/. Retrieved 2012-05-09.

External links

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Development status: this resource is experimental in nature.
Educational level: this is a research resource.
Resource type: this resource is a quiz.
Subject classification: this is an astronomy resource.
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