Q. A man is riding on a flatcar traveling at a constant speed of 9.10 {rm{ m/s}}. He wishes to throw a ball through a stationary hoop 4.90 {rm m} above the height of his hands in such a manner that the ball will move horizontally as it passes through the hoop. He throws the ball with a speed of 10.8 {rm{ m/s}} with respect to himself.
Q. Light of wavelength 467 nm in air enters a fishbowl filled with water, then exits through the crown glass wall of the container. Find the wavelengths of the light (a) in the water and (b) in the glass.