Question

How many polarized filters are needed minimally to block light intensity?

A) one filter
B) three filters perpendicular to each other
C) two filters parallel to each other
D) two filters perpendicular to each other


Consider the following properties. Which applies to light?
A: mechanical wave
B: electromagnetic wave
C: travels in circular paths
D: travels in a straight line

A) a, b, and d
B) b and d
C) a, b, and c
D) a and c