Question

A laser beam is coherent because it contains
(р) waves of several wavelengths.
(b) incoherent waves of a single wavelength.
(c) coherent waves of several wavelengths
(d) coherent waves of a single wavelength.

Answer 1

Answer:

A laser beam is coherent because it contains coherent waves of a single wavelength.

Answer 2

For the given multiple choice question, correct option is D. i.e. coherent waves of a single wavelength.

LASER is the short form of Light Amplification by Stimulated Emission of Radiation. Laser beam is intense, monochromatic (that is of the single wavelength) collimated and highly coherent.

Explanation:

• Laser is the short form of light amplification by stimulated emission of radiation.
• Laser beam is intense, monochromatic (that is of the single wavelength) collimated and highly coherent.
• Laser beam is highly coherent of single wavelengths.
• Laser beam consists of waves of exactly the same wavelength in phase.
• Laser beam is highly coherent.

Hence, correct option is D.

Learn more about LASER-

https://brainly.in/question/3028435?msp_srt_exp=4

https://brainly.in/question/230437?msp_srt_exp=4

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