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Home
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Modern Physics
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Dual Nature of Radiation and Matter
» Question
Dual Nature of Radiation and Matter
Easy Questions
Modern Physics
Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics : Materials, Devices and Simple Circuits
The wavelength of a 1 keV photon is 1.24 × 10
–9
m. What is the frequency of 1 MeV photon?
1.24 × 10
15
2.4 × 10
20
1.24 × 10
18
2 × 4 × 10
23
Correct Option:
B
Here,
hc
= 10
3
eV and hv = 10
6
eV
λ
Hence,
v =
10
3
c
=
10
3
× 3 × 10
8
λ
1.24 × 10
-19
= 2.4 × 10
20
Hz
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