The answer was frequency

Which changes of state do the labels represent? a: b: c:

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?

What will a positive and a negative charge do if they are separated from each other?