Hamid is viewing an image of a bird produced by a set of concave lenses. what must be true about the image?
a)it is a virtual image.
b)it is upside down.
c)it is larger than the actual bird.
d)it is capable of being projected.

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

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.