Samacheer Kalvi Class 9 Science Physics Light Questions - 1

Question: 1

Light refracts when travelling from air into glass because

(A) It travels slower in glass than in air

(B) Its frequency is lesser in glass than in air

(C) It travels with the same velocity in glass and in air

(D) Its frequency is greater in glass than in air

Question: 2

The diameter of the circular rim of the mirror is called

(A) Aperture

(B) Pole

(C) Centre of curvature

(D) Radius of curvature

Question: 3

Mirror which can form a virtual image of the size larger than that of the object is _____ mirror.

(A) Concave

(B) Convex

(C) Plane

(D) Any

Question: 4

A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is

(A) 0°

(B) 45°

(C) 90°

(D) 180°

Question: 5

The speed of light is maximum in

(A) Diamond

(B) Glass

(C) Vacuum

(D) Gold

Question: 6

An object is placed at a distance of 3 m from a plane mirror. How far is the image from the mirror?

(A) 1.5 m

(B) 3 m

(C) 6 m

(D) Infinite distance

Question: 7

Lights travels slower in air than in

(A) Water

(B) Vacuum

(C) Glass

(D) Plastic

Question: 8

Who is the father of Fibre Optics?

(A) Armand Fizeau

(B) Galileo Galilee

(C) Ole Roemer

(D) Narinder Kapany

Question: 9

_____ mirror has a wider field of view than concave and plane mirrors.

(A) Plane

(B) Convex

(C) Concave

(D) Any

Question: 10

When the reflecting surface is curved outward the mirror formed will be

(A) Plane mirror

(B) Concave mirror

(C) Convex mirror

(D) Any