PHYSICS [LIGHT]

Question 1

Water is optically denser than glass

Answer 1

FALSE

Question 2

A ray of light when passes from glass to air, bends towards normal.

Answer 2

FALSE

Question 3

The speed of light is more in glass than water

Answer 3

FASLE

Question 4

The depth of a pond when seen from above appears to be less

Answer 4

TRUE

Question 5

Light travels at a lower speed in water than air

Answer 5

TRUE

Question 6

Light travels in the same straight straight line path while passing through different media

Answer 6

FALSE

Question 7

The angle formed between the normal and the refracted ray is known as angle of incidence

Answer 7

FALSE

Question 8

At the point of incidence, a line drawn at right angles to the surface, separating the 2 media, is called normal.

Answer 8

TRUE

Question 9

Image is formed by a mirror due to refraction of light

Answer 9

FALSE

Question 10

Rays of light incident parallel to the principal axis through the focus after reflection from a concave mirror

Answer 10

TRUE

Question 11

A convex mirror is used as a shaving mirror

Answer 11

FALSE

Question 12

A concave mirror converges the light rays, but a convex mirror diverges them

Answer 12

TRUE

Question 13

A virtual image formed by spherical mirror is always erect and situated behind the mirror

Answer 13

TRUE

Question 14

Water is optically __ than air

Answer 14

DENSER

Question 15

Air is optically ___ than glass

Answer 15

RARER

Question 16

When a ray of light travels from water to air, it bends _____ the normal

Answer 16

AWAY FROM

Question 17

When a ray of light travels from air to glass, it bends ____ the nomal

Answer 17

TOWARDS

Question 18

When white light passes through a prism, it ______

Answer 18

DISPERSES

Question 19

The splitting of white light into its constituient colours is called _______

Answer 19

DISPERSION

Question 20

A _______ mirror is obtained by silvering the outer surface of the part of a part of a hollow glass sphere

Answer 20

CONCAVE

Question 21

Radius of curvature of spherical miror is ____ its focal length

Answer 21

TWICE

Question 22

The angle of incidence for a ray of light passing through the center of curvature of a spherical mirror is ________

Answer 22

0 DEGREES

Question 23

A ______ mirror always forms a virtual image

Answer 23

CONVEX

Question 24

A concave mirror forms a virtual image for an object placed ______

Answer 24

BETWEEN THE POLE AND FOCUS

Question 25

The speeed of light in air is

Answer 25

3 x 10^8 m/s

Question 26

A ray of light moving from a optically rarer to a denser medium

Answer 26

BENDS TOWARDS THE NORMAL

Question 27

The angle between the normal and the refracted ray is called

Answer 27

ANGLE OF REFRACTION

Question 28

The property of splitting of white light into its 7 constituient colours is called

Answer 28

DISPERSION

Question 29

The seven colours of the rainbow are

Answer 29

VIBGYOR

Question 30

A ray of light passing through the centre of curvature of a spherical mirror, after reflection

Answer 30

RETRACES TO ITS OWN PATH

Question 31

The the radius of curvature of a concave mirror is 20 cm, its focal length is

Answer 31

10 CM

Question 32

The image formed by a concave miror is of the same size as the object, if the object is placed

Answer 32

AT THE CENTRE OF THE CURVATURE

Question 33

A convex mirror is used as a

Answer 33

REAR VIEW MIRROR