The energy band gap of semiconducting material to produce violet (wavelength = 4000 Å ) LED is _____…

The energy band gap of semiconducting material to produce violet (wavelength =4000Å) LED is _____ eV. (Round off to the nearest integer).

Solution

Energy gap of semiconducting material Eg=hcλ=1242λnm=1242400=3.105

Answer rounded to 3eV.

Asked in: JEE Main 2022 (25 Jul Shift 1)

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