The assignment is due in 7 hours. I have attached below the question.
Here is the class textbook: https://www.bartol.udel.edu/~owocki/phys633/RadPro…
The assignment questions
1.
Consider a point source which is observed both directly and the light
from this source is observed from a small cloud. If the source is observed
to be unpolarized and the scattering is from Thomson Scattering from
free electrons and the geometry is such that the line from the source to
the small cloud makes an angle of 45° to the line from the object to the
observer. Then what would be the polarization of scattered light from the
cloud. Draw a diagram showing the polarizations.
2. An object has a measured emission at 100 MHz of F = 5×10^-17 ergcm ^-2s^-1Hz^-1
at a telescope with a resolution of 9 arc minutes.
(a) Assuming it is unresolved and radiating as a blackbody, what can
you say about the temperature of the object?
(b) Assuming it is just resolved and radiating as a blackbody and is as
large as can be and not be resolved what can you say about the
temperature?
(c) What can you say about the temperature of the material doing the
emission?
3. Consider the ejecta of a supernova, if we approximate this as a sphere
of radius, R, of 10 solar mass of fully ionized hydrogen at temperature
T=10^6 K, then:
(a) What would be the emission from this sphere if we treated it as a
black bodv?
(b) What would be the emission from this sphere if we treated it as
optically thin Bremmsstrallung?
(c) At what radius are they equal?
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