If a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a gas.
plasma.
solid.
liquid.

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?