Question

Is monochromatic light always coherent?

Answer 1

Explanation:

1. Two wavefunctions are used to describe coherence. Two waves are called coherent waves if they are monochromatic and have the same phase. Coherent sources are those which produce such waves. The characteristics of the optical path can be studied using such waves. To do this, one beam is sent through the intended track while the other is sent as a control test.
2. A single object or subject is denoted by the prefix "mono". Colors are discussed in the phrase "chrome". A certain color is called "monochrome". Before understanding monochrome one must understand the electromagnetic spectrum. Depending on their energy, electromagnetic waves are divided into different regions. To name a few, there are X-rays, ultraviolet, infrared, visible, and radio waves.
3. Everything we see is visible because of the electromagnetic spectrum's visible region. A spectrum is created by plotting the electromagnetic beam's intensity versus energy. Other forms of energy expression include wavelength and frequency.
4. The phase and frequency of the coherent light should both be the same. The only requirement for monochromatic light is the same frequency. A monochromatic source may or may not always be a coherent source, whereas a coherent source is always monochromatic.

Hence, a monochromatic source may or may not be a coherent source, while a coherent source is always monochromatic.