Refraction Of Light Waves

Question 1

Refraction is the

Answer 1

Bending of light ray as it changes media of different densities

Question 2

The refraction is responsible for

Answer 2

(i)The bottom clear river appears shallower than it really is
(ii)rod or spoons appear broken when immersed in water
(iii) letters in print seen to be nearer when we place a thick block of glass over them

Question 3

When light travels from a less dense medium to a more dense medium it and vice-versa?

Answer 3

Bends towards the normal,Bends away from the normal

Question 4

The incident ray is along the normal The ray

Answer 4

Passes through the block

Question 5

Laws of refraction

Answer 5

i angle of incidence and refraction are on the same plane
ii)the ration of sin i/sin r

Question 6

Snells law of refraction is gotten by

Answer 6

A rectangular block

Question 7

In the abscence of a ray box __ can be used to track emergent rAy

Answer 7

Optical pin

Question 8

The refractive index is

Answer 8

Real Depth/Apparent depth

Question 9

Refraction can be explained through

Answer 9

Apparent depth of swimming pool,Apparent bending of stick ,Bringing objects to view

Question 10

Total internal reflection occurs when

Answer 10

When light travels from dense medium to less dense medium

Question 11

It can be studied with a

Answer 11

Semicircular glass

Question 12

Critical angle is the

Answer 12

Angle of incidence in the dense medium when the angle of refraction in the less dense medium is 90

Question 13

Conditions for T.I. R to occur is

Answer 13

Light must be traveling from dense medium to less medium

Question 14

Examples internal reflections in Nature

Answer 14

Mirage,Field of view of fish under water

Question 15

The amount of deviation depends on

Answer 15

(a) the angle of incidence
(B) refracting angle
(C) refractive index

Question 16

____ are used in high quality periscopes mainly because

Answer 16

Triangular prisms,They dont form multiple images

Question 17

In a glass prism being passed throughby white light ___ has the greatest speed ___ and has the least speed

Answer 17

Red and Violet

Question 18

When producing a spectrum its arranged in

Answer 18

Source Slit Coverging lens Prism (60•)converging lens Screen

Question 19

The colour of an object depends on the

Answer 19

Incident light on it ,also on the absorption and reflection

Question 20

The primary colours when combined give

Answer 20

White

Question 21

When a primary colour is mixed with a secondary colour and white is obtained

Answer 21

The colours are called complementary colour

Question 22

Convex lens are ___ while concave lens are

Answer 22

Converging and diverging

Question 23

The eye has a

Answer 23

Crystalline biconvex lens

Question 24

Glass can also be made of

Answer 24

Quartz and plastic

Question 25

The point ___ where light passes through a lens without being devitated is the

Answer 25

Optical centre

Question 26

For all positions the concave lens is

Answer 26

V.E.D

Question 27

The ways the focal length of a mirror can be gotten is

Answer 27

Quick method,plane mirror,using oens formula