How can you calculate the critical angle using the refractive index? (I know that the formula is sin c = 1/n but I'm not sure how to rearrange this so that I only have c on one side).

What ia the energy of an object because of its potential and kinetic energies

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.

Which is a substance that can be separated by physical means and is not the same throughout