engineering recuitment GATE ECE 2023-24 Test Series Electronic Devices Optical Devices Light Emitting Diode (LED)
A 0.46 μm thick sample of GaAs is illuminated with monochromatic light of hν = 2 eV. The absorption coefficient (α) is 5 × 104 cm-1. The power incident on the sample is 10 mW. The number of photons per second given off from recombination events, assuming perfect quantum efficiency is ________ × 1016 photons/s.
Enter numerical value using the virtual keypad. Round off where necessary.