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  • A P-type semiconductor has acceptor levels  above the valence band. The maximum wavel

A P-type semiconductor has acceptor levels 57 \mathrm{meV} above the valence band. The maximum wavelength of light required to create a hole is (Planck's constant \mathrm{h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}} )

Option: 1

57 \AA


Option: 2

57 \times 10^{-3} \AA


Option: 3

217100 \AA


Option: 4

11.61 \times 10^{-33} \AA


Answers (1)

best_answer

\mathrm{E=\frac{h c}{\lambda} \Rightarrow \lambda=\frac{h c}{E}=\frac{6.6 \times 10^{-34} \times 3 \times 10^8}{57 \times 10^{-3} \times 1.6 \times 10^{-19}}=217100 \AA }

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