Question on: JAMB Physics - 2007
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]
A
6.6 X 10-28
B
1.99 X 10-27
C
6.60 x 10-26
D
1.99 x 10-25
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Correct Option: D
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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