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doit_the_clown doit_the_clown
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7 years ago
Most supernova remnants can be observed only at non-visible wavelengths.  Why is this?
A)   Supernova remnants are too cool to produce radiation at visible wavelengths.
B)   Supernova remnants are too hot to produce radiation at visible wavelengths.
C)   Visible wavelengths are produced by supernova remnants but they are blocked by the interstellar medium.
D)   All of the visible wavelengths are Doppler shifted to infrared because all of the supernova remnants are moving away from us at high speeds.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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hyponoticahyponotica
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7 years ago
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doit_the_clown Author
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7 years ago
Smart ... Thanks!
lipop
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Yesterday
Thanks
mmmm_dat_userna
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2 hours ago
this is exactly what I needed
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