If you take two polarizers and put them at right angles to each other's vertical, what is the intensity of the transmitted light?

zero

Explanation:

The intensity of the light passing through a set of two polarizers is given by Malus Law:

where

is the initial intensity of the light before the filter

is the light intensity after the two polarizers

is the direction between the axes of the polarizers

In this problem, the two polarizers are placed at right angle to each other's vertical, so the angle is

Therefore, the intensity of the transmitted light is:

So, no light will pass through the polarizers.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

the right answer is 0.3 meters per second