You are driving in a car and you pass a tree. Which object is the frame of reference?
A)You
B)The car
C)The tree

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these