# Readers ask: What Is The Wave Length Of The Infrared Spectru?

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).

## How do you find the wavelength of an infrared wave?

To find wavelength ( λ ), the equation is manipulated so that λ=cν. What is the wavelength of a electromagnetic wave that has a frequency of 4.95×1014 Hz? Once you have frequency, you can use the first equation c=λ⋅ν to find the wavelength.

## What is wavelength and frequency of infrared?

Infrared (IR) has wavelengths λ between 780 nm and 1 mm, which corresponds to a frequency range from 300 GHz to 400 THz.

## What is the infrared spectrum?

Infrared spectroscopy (IR spectroscopy) is the spectroscopy that deals with the infrared region of the electromagnetic spectrum, that is light with a longer wavelength and lower frequency than visible light. As with all spectroscopic techniques, it can be used to identify and study chemicals.

## Which of the following represents infrared wavelength?

Therefore, the correct answer is option A) \${10^{ – 4}}\$ cm. Note:Infrared radiations cannot be seen (as it is beyond visible rays wavelength) but can be felt due to its warmth. It can be classified as near, middle and far depending upon its distance with respect to the visible spectrum.

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## How does the wavelength of infrared compared with the wavelength of visible light?

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.

## How do you find the IR spectrum?

To generate the IR spectrum, different frequencies of infrared light are passed through a sample, and the transmittance of light at each frequency is measured. The transmittance is then plotted versus the frequency of the light (which is presented in the somewhat unusual units of cm1).

## Which of the following represents the wavelength?

Wavelength is usually denoted by the Greek letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f.

## Which of the following is of shortest wavelength?

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.

## What is the order of wavelength of visible light?

Wavelength of visible light is of the order of 6×10-7m. Wavelength of audible sound in air varies from 16.6×10-3m to 16.6m.