[" GaAs (with a brand gap "=15" ev ) as an "],[" LED can emif "]

GaAs (with a band gap = 1.5eV ) as an LED can emit

GaAs (with a band gap = 1.5 eV) as a L.E.D can emit

The band gap GaAs is

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV . It can detect a signal of wavelength

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV . It can detect a signal of wavelength

the band gap in germanium and silicon in eV are

Assertion: The semiconductor used for fabrication of visible LEDs must at least have a band gap of 1.8 eV. Reason: The spectral range of visible light is 0.4 eV to 1.8 eV