Question

What is the name of the laboratory instrument for measuring the wavelength of some radiation ?

Answer 1

Hint: The interval between two consecutive crests or troughs of a wave is known as its wavelength. UV light has a shorter wavelength than violet light. Likewise, the wavelength of infrared radiation is longer than that of red light. Frequency is inversely proportional to wavelength. Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays are all forms of electromagnetic radiation that are categorized by wavelength. The wavelength of electromagnetic radiation determines how it behaves.

Complete answer:
A Wavemeter may be used to measure some wavelength radiation very precisely (e.g. monochromatic light). The Michelson Interferometer and the Fizeau Interferometer are two examples. When a single wavelength of light is reflected by a diffraction grating, it creates an interference pattern that can be measured with great precision and used to determine an accurate wavelength. Scanning wavemeters and static instruments with no moving parts are examples of different types.

When we check we can identify that some wavemeters have a built-in reference laser, while others depend on an external source. Wavemeters are limited in their wavelength range of operation. Some wavemeters are better suited to intense wavelength regions than others. Various display and software features can help with the handling. Some wavemeters, for example, may display wavelength, wavenumber, and optical frequency values.

So, precisely we can say that the name of the laboratory instrument for measuring the wavelength of some radiation is Wavemeter.

Note: The accuracy of wavelength measurements is influenced by a variety of factors, including beam wavefront distortions. Optical frequency measurements (frequency metrology), which are resistant to such effects, can achieve much higher precision. A wavemeter is normally more accurate than a spectrometer when measuring wavelengths. A spectrometer, on the other hand, has the benefit of providing information on the relative powers of various spectral components. There are also wavemeters that can be used as spectrometers, providing high precision in both roles.