In a p type semiconductor the acceptor level is situated 50 meV above the valence band. The maximum wavelength of light required to produce a hole will be:

1
24.8 × 10⁻⁵ m
2
0.248 × 10⁻⁵ m
3
2.48 × 10⁻⁵ m
4
248 × 10⁻⁵ m

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