A ray of light in water meets a flat sided block of Perspex with an angle of incidence of 55°. The angle of refraction in the Perspex is 47°. If the absolute refractive index of water is 1.33. determine
the refractive index of Perspex​

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th