Which of the following statements is not true for a beam of LASER ?

It is an electro magnetic radiation

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It is highly mono chromatic

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It travels with the speed of light

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It cannot travel in vacuum

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Solution

The correct option is C It cannot travel in vacuum
$\begin{matrix} It is an E.M.W, thus it can easily travel in vaccum. \end{matrix}$
Hence option D is not true for LASER

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Similar questions

Q. Following statements which are true for light waves but not for sound waves are/is

(I) The speed of waves is greater in vacuum than in a medium
(II) Waves of different frequencies travel with different speeds in a medium
(III) Waves travel with different speeds in different media.

The correct statement is :

(a) Sound and light both require medium for propagation

(b) Sound can travel in vacuum, but light can not

(d) Sound and light both can travel in vacuum.

We know that light can travel through a vacuum. But are we able to see light when it travels through a vacuum? If not then what is it that makes stars visible in space(which is a vacuum)?

State true or false.
Similar to sound, light can also not travel in a vacuum.

Similar to sound, light can not travel in a vacuum.

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Which of the following statements is not true for a beam of LASER ?

The correct option is C It cannot travel in vacuum It is an E.M.W, thus it can easily travel in vaccum. Hence option D is not true for LASER

The correct option is C It cannot travel in vacuum
$\begin{matrix} It is an E.M.W, thus it can easily travel in vaccum. \end{matrix}$
Hence option D is not true for LASER