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JEE Main 202225 JulyMorning Shift

Exam: JEE Main
Year: 2022
Date: 25 July
Shift: Morning Shift
Subject: Physics
Chapter: Semiconductors

JEE Main 2022 · 25 July · Morning Shift · Physics · Semiconductors

The energy band gap of semiconducting material to produce violet...

The energy band gap of semiconducting material to produce violet (wavelength

= 4000 Å

) LED is _____

eV

. (Round off to the nearest integer).

Correct answer

0

Step-by-step solution

Energy gap of semiconducting material ${E}_{g} = \dfrac{hc}{\lambda} = \dfrac{1242}{\lambda\left(nm\right)} = \dfrac{1242}{400} = 3 . 105$
Answer rounded to $3eV$ .

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