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14/08/2021 12:17 pm
Topic starter
The number of photons of light having wave number 'x' in 10 J of energy source is:
(a) 10hcx
(b) hc/10x
(c) 10/hcx
(d) None of these
1 Answer
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14/08/2021 12:30 pm
Topic starter
Correct answer: (c) \(\frac{10}{hcx}\)
Explanation:
E = \(\frac{nhc}{\lambda}\)
= nhc\(\bar{v}\)(∵ \(\bar{v}\) = \(\frac{1}{\lambda}\))
∴ 10 = nhc\(\bar{v}\)
or n = \(\frac{10}{hc \bar{v}}\)
= \(\frac{10}{hcx}\)