A tuning fork produces a sound in air. Some of the sound passes into a ceramic tile, meeting its surface at an angle.
Which statement about the pitch of the sound in the tile is correct?
The pitch becomes lower because some energy is reflected at the surface.
The pitch stays the same because the sound does not change direction.
The pitch becomes higher because the tile is more rigid than the air.
The pitch stays the same because the frequency is set by the tuning fork.