Question

What is a monochromatic source of light ?

Answer 1

Lights are made up of a variety of colours. Sunlight is made up of seven different colours. Monochromatic refers to a single colour. Monochromatic light is defined as light that has only one colour. Although monochromatic light technically has only one wavelength, no genuine electromagnetic radiation is fully monochromatic, hence monochromatic light is stated to have a wavelength in the very short wavelength range.

Complete answer:
A monochromatic source is one that emits only one colour of light (flash units are monochromatic, usually $5000K$ ). Simply said, light of the same wavelength emits only one colour, making it monochromatic.

Monochromatic light source: Elements in a gaseous form emit certain wavelengths of light. Sodium, for example, emits at $4890A$ . These monochromatic lights have been in use for over a century as a monochromatic light source. Sodium lamps, mercury lamps, and spark lamps are all common examples.

Filters: Filters can be used to convert a light source with several wavelengths into monochromatic light. It distinguishes a single wavelength from the rest of the light. These are commonly used in astronomy to separate $H - alpha$ and $Ca$ lines, among other things, from light from the sun and other stars.

Lasers: Since their introduction, lasers have proven to be the most helpful source of monochromatic light for a variety of scientific studies. Lasers are extremely monochromatic and come in a variety of wavelengths.

Note: In Calibration labs, Monochromatic Light sources are used to evaluate Micrometer Anvils & Mechanical Seals, Pump Valves, and other automotive Parts manufacturers. Monochromatic light sources are highly dispersed Sodium light that can be used to check the flatness of flat plates using Master Optical Flats. Through planar acrylic, sodium vapour light is directed on the component under inspection.