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A P-type semiconductor has acceptor leve...

A `P`-type semiconductor has acceptor levels `57 meV` above the valence band. The maximum wavelength of light required to create a hole is (Planck's constant `h=6.6xx10^(-34)J-s`)

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`E=(hc)/(lamda)rArr lamda=(hc)/(E)=(6.62xx10^(-34)xx3xx10^(5))/(57xx10^(-3)xx1.6xx10^(-19))=217100 Å`
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