Which of the following is a unique property of laser?(a) Directional(b – InterviewSolution

InterviewSolution

1.	Which of the following is a unique property of laser?(a) Directional(b) Speed(c) Coherence(d) Wavelength
Answer» The correct choice is (c) Coherence Easiest explanation: Coherence is an important characteristic of laser beam because in laser beams, the wave trains of the same frequency are in phase/ Due to high coherence it results in extremely high power.

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