Abeam of light from a flashlight at the bottom of a swimming pool is incident on the surface of the pool at an angle of 25 degrees to the normal. find the reflected angle in the water and refracted angle for the light entering air above the pool. n=1 for air and n=1.33 for water

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.