Which of the following properties of laser beam can be used to measure long distances?

It is very intense.

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It is highly monochromatic.

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It is an unidirectional beam of light.

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All of these

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Solution

The correct option is A All of these
A laser is a source of very intense, monochromatic and undirectional beam of light. These properties of a laser light can be exploited to measure long distances.

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