When a narrow laser beam passes through a fine wire mesh before arriving at the wall, it forms a complicated..

Question

When a narrow laser beam passes through a fine wire mesh before arriving at the wall, it forms a complicated pattern of bright spots on the wall. This pattern of spots would not occur if you sent a flashlight beam through the mesh because light from the flashlight (Select one)


A) is horizontally polarized, while laser light is vertically polarized.

B) is vertically polarized, while laser light is horizontally polarized.

C) is not a single electromagnetic wave.

D) cannot be sent through a single opening of the mesh.

WHY?

I don't udnerstand the question

Answer 1

Actually U could use a flashlight, but U must pass the light first thru a very narrow mesh. And then, let it pass thru the fine wire.

That because U have to have a light bean with the width near the light wavelength.

In fact, a scientist that I forgot the name made some experiments on that long BEFORE the invention of laser or even the maser (laser of microwave, the first invented).

So, the closest answer to your question will be the

C) is not a single electromagnetic wave.

Althought, the laser it's NOT a SINGLE wave! It's just very, very narrow.

Answer 2

c is the closest correct answer and it is due to the coherence of the laser beam (all the waves being in phase) compared to the lack of coherence of the torch beam.