Kerala (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
The distance by which a person cannot see nearby objects clearly is called

(A) Hypermetropia	(B) Myopia
(C) Cataract	(D) None of these

Question-2 _______ is the centre of the sphere of which the lens is a part.

(A) Radius of curvature	(B)Principal axis
(C)Centre of curvature	(D)None of these

Question-3
Hypermetropia which develops at an advanced age in life is known as

(A) Myopia	(B) Presbyopia
(C) Cataract	(D) None of these

Question-4
The speed of light in glass is

(A) 3 × 10⁸ m/s	(B) 2.25 × 10⁸m/s
(C) 2 × 10⁸ m/s	(D) None of these

Question-5
Name the scientist who is often considered as father of modern physics

(A) Sir.Isaac Newton	(B) Albert Einstein
(C) Christian Huygens	(D) Willebrord Snell

Question-6
When the object is beyond 2F, the image formed is

(A) at F	(B) at 2F
(C) Between F and 2F	(D) at infinity

Question-7
The defect of hypermetropia may be corrected by using

(A) Concave lens	(B) Convex lens
(C) Prism	(D) None of these

Question-8
When a light ray travels from a rarer medium to a denser medium

(A) It bends towards the normal	(B) It bends away from the normal
(C) The ray suffers no refraction	(D) None of these

Question-9
The point at which the incident ray meets the separating surface is called

(A) Point of incidence	(B) Point of refraction
(C) Point of diversion	(D) None of these

Question-10
The geometric centre of a lens is called

(A) Centre of curvature	(B) Principal axis
(C) Optical centre	(D) Principal focus

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Std 9

Kerala (English Medium)

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