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JEE MAIN 2024
09-04-24 S1
Question
A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42eV. The wavelength of light emitted from the LED is:
Select the correct option:
A
650 nm
B
1243 nm
C
875 nm
D
1400 nm
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
$\lambda=\frac{1240}{1.42}=875 \mathrm{~nm}$ (Approx)
Question Tags
JEE Main
Physics
Easy
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