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The output from a LASER is monochromatic...

The output from a LASER is monochromatic. It means that it is :

A

directional

B

polarised

C

narrow beam

D

single frequency.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "The output from a LASER is monochromatic. It means that it is:", we need to understand the term "monochromatic" in the context of LASER output. ### Step-by-Step Solution: 1. **Understanding Monochromatic Light**: - The term "monochromatic" refers to light that consists of a single wavelength. This means that all the light waves emitted have the same frequency. 2. **Characteristics of LASER Light**: - LASER (Light Amplification by Stimulated Emission of Radiation) produces light that is highly coherent, directional, and monochromatic. - Among these characteristics, the key feature we are focusing on is that LASER light is monochromatic. 3. **Options Analysis**: - The options provided are: 1. Directional 2. Polarized 3. Narrow beam 4. Single frequency - Since "monochromatic" means having a single wavelength, it also implies having a single frequency (as frequency and wavelength are inversely related). 4. **Conclusion**: - Therefore, the correct answer to the question is that the output from a LASER being monochromatic means that it is "single frequency". ### Final Answer: The output from a LASER is monochromatic, which means that it is **single frequency**. ---
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