***20 points*** what statements best describes x-rays? check all that apply. 1. x-rays are electromagnetic waves. 2. x-rays are longitudinal waves. 3. x-rays are mechanical waves. 4. x-rays are transverse waves. 5. x-rays travel at the speed of light. 6. x-rays travel at the speed of sound.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.