Electronic Devices and Circuits - ECE Questions and Answers

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A particular green LED emits light of wavelength 5490, Å, the energy bandgap of the semiconductor material used there is .. h = 6.6 x 10^-34 J sec.

2.26 eV

1.98 eV

1.17 eV

0.74 eV

Answer : Option A

Explanation :

From Plank equation joule

to convert it into electron volt it will be divided by 1.6 x 10^-19.

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