(A) Gamma rays (X)
(B) Microwaves (X)
(C) A beam of white light (X)
(D) A beam of coherent light ()
Answers: Laser is a device to produce A beam of coherent light.
(A) Gamma rays (X)
(B) Microwaves (X)
(C) A beam of white light (X)
(D) A beam of coherent light ()
Answers: Laser is a device to produce A beam of coherent light.
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