Alight beam is incident on a piece of fluorite (n = 1.434) at the brewster's angle.
(a) find the value of brewster's angle.

°

(b) find the angle of refraction for the transmitted ray.

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.