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Question : 18
Total: 30
(i) Monochromatic light of frequency 6.0 × 10 14 Hz 2.0 × 10 − 3 W
(ii) Draw a plot showing the variation of photoelectric current versus the intensity of incident radiation on a given photosensitive surface.
(ii) Draw a plot showing the variation of photoelectric current versus the intensity of incident radiation on a given photosensitive surface.
Solution:
(i) An energy,
E = h v
= 6.63 × 10 − 34 × 6.05 × 10 14
= 3.98 × 10 − 19 J
Now,number of photons emitted per second
n =
= 2.0 ×
× 10 − 19 J
= 5 × 10 15 photons per second
(ii)
Now,number of photons emitted per second
(ii)
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