Question

What is it called when light changes direction after leaving a lense ? ​

Answer 1

Answer:

For a lens it is called refraction. Refraction is the change in the direction of light when passing from one transparent medium to another.

Answer 2

For a lens it is called refraction. The phenomenon of refraction takes place because of the difference in speed in different media. For a mirror , the change in direction of light is known as reflection. The phenomenon of bouncing back of light into the same medium by the smooth surface is called reflection.

Hope it's helpful.... ^_^