The energy E of a photon and it’s wavelength are related by Eλ = X. the numerical value of X is?
[h = 6.63 x 10-34js, c = 3 x 108 ms-1]
- 6.6 X 10-28
- 1.99 X 10-27
- 6.60 x 10-26
-
1.99 x 10-25
The correct answer is: D
Explanation
E = HF = (hc)/λEλ = hc
∴ X = hc ==6.63 x 10-34 x 108
= 1.989 x 10-25
=1.99 x 10-25