Question

the wavelength of infra red led is​

Answer 1

Answer:

Infrared (IR) radiation covers the wavelength range above 800 nm and is subdivided in IR-A, IR-B and IR-C ranges. The work horse semiconductor epitaxy for this type of device is AlGaAs. This material is grown to produce devices from the Red Visible Light range through to 1550 nm λp.

Answer 2

The wavelength of infrared led is​ ranging from 820nm to 880nm.

• Infrared rays are produced by laser or LED.
• The wavelength of infrared rays emitted by laser or LED is ranging from 820nm to 880nm.
• These infrared radiations wavelength is a bit longer than the wavelength of visible light.
• Hence, they are invisible and can only be sensed by a heat sensor or warmth on the skin.