Answer:
1.Light unlike sound does not need a medium to propagate. So it doesnot get carried away due to disturbances in the medium in which it is propagating. But sound does get carried away by wind etc as wind ‘carries’ the sound.
2.Materials like air, water, and clear glass are called transparent. When light encounters transparent materials, almost all of it passes directly through them. Glass, for example, is transparent to all visible light. Translucent objects allow some light to travel through them
3.Shadows are formed, when there is an obstruction of light created by the object. Shadow on the screen is that part where light does not reach and hence creating a dark image on the screen just like the shape of the object which is obstructing the light.
Explanation:
