Dual Nature Of Light Question 406
Question: A parallel beam of light of wavelength 600 nm and intensity $ 100w{{m}^{-2}} $ . How many photons cross $ 1cm^{2} $ area perpendicular to the beam in 1 sec?
Options:
A) $ 3.0\times 10^{16} $
B) $ 4.0\times 10^{15} $
C) $ 2.0\times 10^{14} $
D) $ 1.0\times 10^{13} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] number of photon $ =\frac{P\times t\times \pi r^{2}}{hc/\lambda } $
BETA
