Definition and relationship to the electromagnetic spectrum

Name Wavelength Frequency (Hz)
Visible 400 nm – 700 nm 430 THz – 750 THz
Infrared 700 nm – 1 mm 300 GHz – 430 THz
Microwave 1 mm – 1 meter 300 MHz – 300 GHz
Radio 1 meter – 10,000 km 30 Hz – 300 MHz

## What is the wavelength of infrared radiation?

The infrared range covers 700-1000 nm (wavelength), or 14,286-12,800 cm1 (wavenumber), and ultraviolet radiation has wavenumbers above these, approximately, 25,000 – 50,000 cm1, or 100 to 400 nm (wavelength).

## What wavelengths of light does infrared light contain?

Infrared (IR) light is a type of electromagnetic radiation that lies between the visible end of the light spectrum, and the microwave spectrum (Vollmer and Mollmann, 2010). Its wavelength ranges from about 800 nm to 1 mm and it is emitted particularly by heated objects.

## Does visible light and infrared have the same wavelength?

Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption. Thus, infrared energy can also reveal objects in the universe that cannot be seen in visible light using optical telescopes.

## Is infrared light visible?

What is infrared light? Infrared waves are a portion of the light spectrum that follows red. They have longer wavelengths than visible light, ranging from 700 nanometers to one millimeter. This renders them invisible to humans in almost all conditions.

## Which of the following is infrared wavelength?

IR frequencies range from about 300 gigahertz (GHz) up to about 400 terahertz (THz), and wavelengths are estimated to range between 1,000 micrometers (µm) and 760 nanometers (2.9921 inches), although these values are not definitive, according to NASA.

## How does the wavelength of infrared compared with the wavelength of ultraviolet waves?

Infrared waves have a wavelength 1,000x longer than ultraviolet waves (10^-16 vs 10^-13). The amplitude (or height) of an electromagnetic wave is proportional to its intensity.

## Are infrared waves electromagnetic or transverse?

We know that there are two types of wave – transverse waves and longitudinal waves. Radio waves, microwaves, infrared, visible light, ultraviolet light, X-rays and gamma rays are all transverse waves. They are also all members of the electromagnetic spectrum and some of them can be used for communication.

## Which has the greater wavelength visible light or infrared?

All forms of light are electromagnetic waves. Infrared (IR) light has longer wavelengths than visible light.

## How does infrared differ from visible light?

Visible light has a wavelength that ranges from 380 nm – 750 nm on the electromagnetic spectrum while infrared light is just beyond it, ranging from 700 nm – 1 mm, the start of the non-visible portion of the spectrum. As a result, infrared cannot be seen except with special equipment like a security camera.

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## How do the wavelength and frequency of infrared light compare?

How do the wavelength and frequency of infrared light compare to the wavelength and frequency of ultraviolet light? The wavelength of infrared is larger than that of ultraviolet, and the frequency is smaller. Light waves have a lower frequency and longer wavelength than X-rays.

## Which radiation has longest wavelength?

Nearly all frequencies and wavelengths of electromagnetic radiation can be used for spectroscopy. Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

## How is infrared wavelength measured?

The optical system of an infrared thermometer captures the energy emitted from a circular measuring spot and focuses it onto a detector. A material with a high transmission factor is used for the lenses. The energy captured by the detector is electronically amplified and converted into an electrical signal.