Two sheets of polarizing material are placed such that their polarizing axes are 90° to each other and no light passes through the combination. Can you place a third sheet of polarizing material between the two and cause light to pass through this three-sheet combination? Explain why if this is possible.

Explanation:

Polarization In this case angle of incidence is not equal to angle of polarization, hence reflected light is partially polarized and transmitted light is also partially polarized.  by reflection is explained by Brewster's law,  

According to this when unpolarized light incident on glass plate at an angle is called as angle of polarizing the reflected light is plane polarized, and transmitted light is partially polarized. The plane of vibration of polarized light is having plane of vibrations perpendicular to plane of incidence.

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.