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If there is dust in the air you can see it as it hits these particles. By the way, you can't see any form of light, laser or otherwise, as it passes through clean air.

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Q: Why cant you see a laser beam as it crosses the room?
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Why can't we see a laser beam going across the room unless there is fog chalk dust or a mist in the air?

you can, it all depends on the type of laser.


What are examples of parallel beam of light?

Rays from the sun are very close to parallel. Rays from a more distant star will be even closer to parallel.However, since light propagates as waves, you cannot have truly parallel beams which do not interfere.


Is it safe to leave laser show projector on all night in your room?

Probably, but keeping equipment you don't need on is a waste of energy.


Does a shadow allow light to pass through it?

In practical terms, yes. Look at your shadow on the lawn. Can you still see the blades of grass? Of course you can. If light (photons) could not travel "through the shadow", you would not be able to see the blades of grass.It depends on the shadow; a shadow could block all light if the object casting the shadow is large enough, but I'm unable to think of a single example. Some light can be seen even during a total solar eclipse (from the corona), and even on a moonless night there is some ambient light. And Einstein proved that light bends! Your question is not as simple as it seems; the only "total shadow" I know of is a black hole, and black holes allow no light to escape.I did think of one example. A laser (light amplification by stimulated emission of radiation) casts a coherent beam; i.e., the light does not diffuse (spread) beyond the circumference of the beam. So if one places an object larger than the beam in front of the laser beam, within a darkened room, the shadow cast by that object absolutely will block any transmission of light.


When ray of sunlight entres a dark room its straight path become visible because of dust particles?

True, because you can't see "a beam of light", only what it illuminates.

Related questions

Why can't we see a laser beam going across the room unless there is fog chalk dust or a mist in the air?

you can, it all depends on the type of laser.


In Club Penguin where is the laser room?

pancake room


What does beams mean?

The phrase "laser beam" refers to the columnated light that is emitted by a Laser.


Working of laser beam in CD room?

The lazer hits the CD bouncing back the information contained in it to the equipment and relaying it back all the way to the monitor to be read or the speakers to be heard. It is the input output works of the computer.


Can a solar panel detect a laser pointer?

Yes. I saw a demonstration where a professor used a custom-built system consisting of: a speaker with a solar panel wired into the input line, and a laser pointer wired into the output line of an iPod. When the iPod played, it caused the laser pointer to activate, sending the beam (and energy) to the solar panel, which powered the speakers. He sent some music across the room with it. It was a great little project.


How do you get the heat beam in Metroid prime trilogy game 1?

The Plasma Beam is in a room called Plasma Processing. This small room is located at the top of the Geothermal Core, which in turn can be found in the Magmoor Caverns. You need the spiderball and grapple beam to get to the top though.


Where is Laser ablation of the prostate done?

The procedure is done in an operating room


Do you get a laser right when you come in from wimpy boardwalk in the laser tag room?

I dont really understand what u mean but you can get a free laser gun by clicking on the guns at the side of the room on the first level :) U can choose from two colours: Red and green. You can also shoot people by hitting the spacebar button :) Have fun with ur laser gun!


Can Vampires Enter A room?

yes that is legend like crusafixs [crosses] garlic holy water.o_0


What is a room cant you enter at?

MUSHROOM


How do you settle dust in a room?

you cant


How do you get to the light beam on Metroid prime echoes?

You will find it after you gain the Dark Beam. So after the Dark Beam is acquired, go to the room with the inactive portal. Now activate it with the Dark Beam. So go into Dark Aether, and soon (if you keep looking around) you wil find the Light Beam.