A light emitting diode (LED) is fabricated using Ga As semiconducting material whose band gap is 1.42 eV. The wavelength of light emitted from the LED is:  

(1) 650 nm 

(2) 1243 nm 

(3) 875 nm

(4) 1400 nm                                  JEE-2024        

Solution:                
A light emitting diode (LED) is fabricated using Ga As semiconducting material whose band gap is 1.42 eV. The wavelength of light emitted from the LED is: (1) 650 nm (2) 1243 nm (3) 875 nm (4) 1400 nm JEE-2024

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