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The Energy E Of A Photon And It's Wavelength Is Related By Eλ = X. The Numerical Value Of X Is? [h = 6.63 X 10^-34Js, C = 3 X 10^8 Ms−¹] - Erudites Academy

The energy E of a photon and it’s wavelength is related by Eλ = X. The numerical value of X is? [h = 6.63 x 10^-34Js, C = 3 x 10^8 ms−¹]

A. 6.6 X 10^-28
B. 1.99 X 10^-27
C. 6.60 x 10^-26
D. 1.99 x 10^-25

Correct Answer:

Option D = 1.99 x 10^-25

Explanation

E = HF = (hc)/λ
Eλ = hc
∴ X = hc ==6.63 x 10^-34 x 10⁸
= 1.989 x 10^-25
=1.99 x 10^-25

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4 years ago