PPSC Physics Topic 4 MCQ Test With Answer

An important topic in the PPSC Physics Test is Geometrical Optics. In the field of Geometrical Optics, physicists study the propagation and behavior of light with the help of abstract mathematical rays. The process of abstraction of the concept of light makes it easier for the physicists to study the light when it goes from one place to the other or strikes with some material. Our understanding of the universe is nothing without the visible light that allows us to see things with our naked eyes. The importance of Geometrical Optics is therefore fundamental in the study of Physics as it enables us to understand how we see and what improvements we can make to see things better.

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MCQ's Test For PPSC Physics Topic 4 Geometrical Optics

Try The MCQ's Test For PPSC Physics Topic 4 Geometrical Optics

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PPSC Physics Topic 4 Geometrical Optics

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Question # 1

Sunlight can undergo total internal reflection if it enters from

Question # 2

Due to which phenomenon, diamond shrines so brightly.

Question # 3

Which Muslim Scientist gave the first clear description and correct analysis of pinhole camera.

Question # 4

A lens whose thickness is small as compared to focal length is a

Question # 5

The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so that the lens acts as a magnifying glass.

Question # 6

An object of placed at the centre of curvature of a concave mirror The image produced by the mirror is located.

Question # 7

In a compound microscope magnification will be large if focal length of eyepiece is

Question # 8

Colour of light is determined by its

Question # 9

The resolving power of an instrument increases as the wavelength of light used decreases, the magnifying power will

Question # 10

The near point of a person is 50 cm and his far point is 200 cm The power of the lenses which his spectacles should have to see clearly distant objects will be.

Question # 11

Two convex lenses of equal focal length 'f' are placed in contact, the resultant focal length is

Question # 12

a spectrometer is used to study

Question # 13

A convex mirror is used to reflect light from an object placed 66 cm in front of the mirror. The focal length of the mirror is 46 cm Find the location of the image.

Question # 14

Plossi or symmetrical eye piece consists of

Question # 15

A concave mirror is used to form an image of the sun on a white screen IF the lower half of the mirror were covered with an opaque card the effect on the image on the screen would be.

Question # 16

The image of an object 5 mm high is only 1 cm high. The magnification of the lens is

Question # 17

A ray of light from air into glass The angle of incidence is 30o if the refractive index of glass in 1.52 The angle of refraction will be.

Question # 18

Which is the thick circular structure in teh eye containing an aperture with variable diameter It controls the amount of light reaching the retina.

Question # 19

The relation between refractive index an critical angle is.

Question # 20

An image formed on the film of camera is

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PPSC Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Which was the transparent front part of the eye that covers the pupil, iris and interior chamber.
A. Cornea
B. Fovea
C. Sclera
D. Choroid
2 Which of the following is used as a remedy for defect of hypermetropia.
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Bifocal length lens
3 In case of a convex lens, when object is placed at F
A. the image is formed beyond 2 F
B. the image is formed between F and 2 F
C. No image is formed
D. the image is formed behind the object
4 The maximum number of rays required by a lens to form an image are
A. 2
B. 3
C. 4
D. Infinite
5 the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33
A. 1.9 m
B. 2.3 m
C. 3.13 m
D. 4.5 m
6 The diameter of a lens is called.
A. Focal length
B. Principal axis
C. Optical centre
D. Aperture
7 What is the magnifying power of a convex lens of focal length 5 cm.
A. 3
B. 5
C. 6
D. 20
8 A Galilean telescope with objective of coal length 30 cm and eyepiece of focal length.8 cm when focused for infinity has length equal to
A. 7.5 cm
B. 2.2 cm
C. 38 cm
D. 240 cm
9 A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror What is the object distance.
A. -5.0 cm
B. -7.5 cm
C. -15 cm
D. -20 cm
10 The magnifying power of a convex lens of focal length 5 cm is
A. 3
B. 5
C. 6
D. 20

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