- #1
Reshma
- 749
- 6
I seem to have a problem understanding this problem let alone solving it
A star emits 2x1045 photons per sec, 80% of which are in the visible range. The star is 1200 light years away, and the night adapted eye, whose pupil makes an opening 4mm in diameter, can barely see the star. How many photons per sec are necessary to trigger the eye as a detector?
I figured out the number of photons in the visible range is = 0.8x2x1045
Can someone help me proceed?
A star emits 2x1045 photons per sec, 80% of which are in the visible range. The star is 1200 light years away, and the night adapted eye, whose pupil makes an opening 4mm in diameter, can barely see the star. How many photons per sec are necessary to trigger the eye as a detector?
I figured out the number of photons in the visible range is = 0.8x2x1045
Can someone help me proceed?