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STANDARDPhysics-Semiconductors

STANDARD Physics Photon Energy MCQ Question

Type: MCQ-numerical-Medium

If the energy of a photon of sodium light (λ = 589 nm) equals the band gap of semiconductor, the minimum energy required to create electron hole pair

A

1.1 eV

B

2.1 eV

C

3.2 eV

D

1.5 eV

Correct Answer

Option B

Detailed Explanation

Using the formula E = rac{hc}{\lambda}, where h=6.6imes10−34 extJsh = 6.6 imes 10^{-34} \, ext{Js} and c=3imes108 extm/sc = 3 imes 10^8 \, ext{m/s}, the energy is calculated to be 2.1 eV.

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