Q187
The wavelength of light emitted by a GaAs laser is 8670 × 10-10 m. Given Planck's constant = 6.6256 × 10-34 Js, velocity of light = 2.998 × 108 ms-1 and 1eV = 1.602 × 10-19 J, the energy gap in GaAs is
A.
0.18 eV
B.
0.7 eV
C.
1.43 eV
AnswerD.
2.39 eV
Answer: Option C
Solution
Answer: Option C
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