As the bubble is a spherical entity, the probability of total internal reflection from the watery films is high due to its curvature. As a result, most of the light rays get reflected and therefore the air bubble shines brightly with some sparkling in water
They shine because of total reflection. The speed of light is faster inside the air bubble than in the water. Thus the light gets reflected away from the bubble around the outside, looking like a mirror. This is only along the outer circle in the direction you are looking.
The S wave penetrate the interior of he earth shake the ground perpendicular to the direction in which they are propageting. It does not travel through liquids. 1.7 times slower than P waves
