Question

The wavelength and intensity of light emitted by a LED depend upon ______.

Options

• forward bias and energy gap of the semiconductor.

• energy gap of the semiconductor and reverse bias.

• energy gap only.

• forward bias only.

Answer 1

The wavelength and intensity of light emitted by a LED depend upon energy gap of the semiconductor and reverse bias.

Explanation:

The wavelength (or colour) of light emitted by an LED depends on the energy gap of the semiconductor material. The intensity of light depends on the forward bias current; a higher forward current produces greater light intensity.