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  • Three photo diodes D1, D2 and D3 are made of semiconductors having band gaps of 2.5eV, 2eV and 3eV, respectively. Which ones will be able to detect light of wavelength

 Three photodiodes D1, D2, and D3 are made of semiconductors having band gaps of 2.5eV, 2eV, and 3eV, respectively. Which ones will be able to detect light of wavelength A^{\circ}?

Answers (1)

Explanation:-

According to the problem, the wavelength given 

Wavelength of light \lambda = 6000 A^{\circ}-6000\times 10^{10}m

now, 

using the Energy of light proton

E=\frac{h_{c}}{\lambda}=\frac{6.62\times10^{-34}\times3 \times 10^{8}}{6000\times10^{10}\times1.6\times10^{19}}eV=2.06eV

The energy of light is 2.06V

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infoexpert24

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