The energy E of a photon and its wavelength are related by Eλ = X. The numerical value of X is
A.
1.99 x 10-27
B.
6.60 x 10-26
C.
1.99 x 10-25
D.
6.60 x 10-25 [h = 6.63 x 1034 Js, c = 3 x 108 ms-1].
Answer: C
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