Suppose water waves are moving from the deep end to the shallow end of the pool. That is, the waves are moving into a medium (shallow water) where they slow down. In what direction will the waves turn slightly, and why

The wave turn slightly to the bottom.

Explanation: Because part of the wave travel faster causing the wave to turn.

If the wave is moving from deep to shallow, as the depth approaches 1/2 a wavelength, things start to change - the wave will start to rise vertically and eventually brake. You can imagine the bottom of the wave hitting the sea bottom and slowing down, the frequency will go up, the velocity of the wave will go down.

As a wave moves into shallow water, its orbitals “feel the bottom,” causing it to slow down. This end is in shallower water, so it slows down towards the shore than the slower-moving end in.

Water waves will change direction at a boundary between deep and shallowwater. The waves slow down as they enter the shallow water which causes the wavelengths to shorten.

As waves travel into the denser medium, they slow down and wavelength decreases.Part of the wave travels faster for longer causing the wave to turn.The wave is slower but the wavelength is shorter meaning frequency remains the same.

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

truck y has a greater velocity than truck x.