Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Semiconductors and Electronic Devices

Question:

In a p–type semiconductor the acceptor level is situated 57 meV above the valence band. The maximum wavelength of light required to produce a hole will be –

Options:

57 Å

$57 × 10^{–3} Å$

217100 Å

$11.61 × 10^{–33} m$

Correct Answer:

217100 Å

Explanation:

$λ=\frac{hc}{eE}=\frac{6.62× 10^{–34}×3×10^8×10^{10}}{1.6×10^{-19}×57×10^{-3}}Å=217100Å$