25. The value of Planck's constant is 6.63 x 10-34Js. The
speed of light is 3 ~ 1017 nm s-1. Which value is closest to
the wavelength in nanometer of a quantum of light with
frequency of 6 x 10155-1?
(A) 75
(B) 10
(C) 25
(D) 50
Answers
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The correct option is : (c) 4 x 101 Explanation : Applying (u) = c/λ
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