engineering recuitment GATE IN Test Series 2023-24 Mock Test Communication Systems Optical Sources and Detector LED
A LED is made using GaAs (Eg = 1.42, ηx = 3.6). The transmission factor at the crystal-air interface is 0.68. If only 50% of the electrical power supplied is converted to internal optical power. Then the external power efficiency is _____ %.
Enter numerical value using the virtual keypad. Round off where necessary.