Question

Which one of the following statements is incorrect about laser? *

2 points

A.It is a technique for producing intense beams of light, ultraviolet or infrared radiation of different wavelength.

B.Even in diamond laser beam can drill a hole.

C.A variety of lasers have been made from solids like the ruby crystal and semi conducting materials, liquids and gases.

D.All waves in laser, travel in phase

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Answer 1

C.A variety of lasers have been made from solids like the ruby crystal and semi conducting materials, liquids and gases.

Answer 2

Answer:

A

it's can technique for producing intnce beams

pls mark me as brainliest