This is probaly the first and only real question ive asked and will ask but can someone help me plzzz!

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.

The receptor cells that convert light energy into neural signals are called

What are known as the properties of substances that describe a substance et does not change that substances?