Refraction of light

Question 1

is any piece of transparent material having at least one spherical surface.

Answer 1

A lens

Question 2

is the bending of light when it passes from one medium to another of different optical density.

Answer 2

Refraction

Question 3

a lens thicker at the edges is a

Answer 3

concave lens

Question 4

A convex lens is

Answer 4

converging

Question 5

a concave lens is

Answer 5

diverging.

Question 6

Upright is

Answer 6

Virtual image

Question 7

Inverted is

Answer 7

Real image

Question 8

Reflection from smooth surfaces is called

Answer 8

regular or specular
reflection.

Question 9

Reflection from rough surfaces is called

Answer 9

diffuse reflection

Question 10

is more common than regular reflection. The walls, ceiling, floors, and most of the objects inside our rooms, except the mirrors, are rough surfaces and hence scatter the light incident
upon them.

Answer 10

Diffuse reflection

Question 11

is an important principle in a reflecting telescope. In addition, without it , we would not be able to see our image in a mirror

Answer 11

Specular or regular reflection