The wavelength of light emitted by GaAs laser is 8670 x 10-10 m. If h = 6.626 x

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The wavelength of light emitted by GaAs laser is 8670 x 10^-10 m. If h = 6.626 x 10^-34 Js, velocity of light = 3 x 10⁸ m/s and eV = 1.602 x 10^-19 J, the energy gap in GaAs is
Options
A. 0.18 eV
B. 0.7 eV
C. 1.43 eV
D. 2.39 eV

Correct Answer

1.43 eV

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