When a laser is shined into a glass ball such as this video (link) or a bottle of water (link) the light is refracted through the whole transparent body. However, the intensity of the light scattered to the camera differs through the ball (or the bottle). For example, the green around the perimeter of the ball is significantly brighter than that in the centre. What is the mechanism behind this? Is is because even "monochromatic" lasers consists of different wavelengths and those are dispersed by the glass/ plastic jar?
Edit: changed "reflected" to "scattered"