Astrophysics - Cosmology Flashcards
(3 cards)
1
Q
Why does an X-ray telescope need to be in orbit
A
X-rays are absorbed by the Earth’s atmosphere
2
Q
Define black hole
A
An object whose velocity is greater than the speed of light
3
Q
Process of photons involved in detection of a photons by CCD
A
CCD consists of a silicon chip
Incident photons cause electrons to be released
Electrons are trapped in potential wells in CCD
