Domestic dust fibers visualization device

[amorrison]

When a narrow beam of sunlight come through the window of a dark room, dust particles can be seen "floating" in the air.

Is there any way of doing this artifically?

 

[KiwiMace]

What is your goal here? If this is some obscure aesthetic pleasure, put a big light outside and shut all your other curtains.

If you want to count or measure particulates, trap and filter a sample.

 

[hacksaw]

optical methods are commonly used for particulates and there is a lot of literature on the internet