ECAT Pre Computer Science Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 9 Physical Optics

Try The MCQ's Test For ECAT Physics Chapter 9 Physical Optics

  • Total Questions15

  • Time Allowed20

Start Test Download PDF

ECAT Physics Chapter 9 Physical Optics

00:00
Question # 1

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 2

Resolving power in mth order diffraction for grating is given by:

Question # 3

The wave nature of light was proposed by:

Question # 4

The magnifier forms a virtual image of the object at:

Question # 5

Least distance of distinct vision of an old man possibly becomes:

Question # 6

A ray passing through optical center of a lens, after refraction:

Question # 7

The property of light which does not change with the nature of the medium is:

Question # 8

Huygen principle is used to determine:

Question # 9

The focal length of convex lens having magnifying power of 5.55 is:

Question # 10

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 11

The locus of all the points in the same phase of vibration is called:

Question # 12

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 13

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 14

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 15

Light waves are:

Submit

Prepare Complete Set Wise ECAT Physics Chapter 9 Physical Optics MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Physics Chapter 9 Physical Optics MCQ`s Test

  • H
    Heer 21 - Jan - 2024 00 Min 29 Sec 60/60
  • V
    Vertex Gaming 16 - Jul - 2024 00 Min 47 Sec 55/60
  • T
    Tasser Haider 31 - May - 2024 01 Min 13 Sec 50/60
  • M
    Maham Mehar 31 - Jul - 2024 02 Min 42 Sec 50/60
  • M
    Manoush Fatima 31 - May - 2024 03 Min 21 Sec 50/60
  • A
    Abdullah Baloch 27 - Jul - 2024 03 Min 48 Sec 50/60
  • E
    Esha Azeem 03 - Dec - 2023 15 Min 03 Sec 50/60
  • M
    Muhammad Hashim 02 - Jun - 2024 02 Min 01 Sec 45/60
  • A
    Ayan Shuaib 29 - Jan - 2024 02 Min 23 Sec 45/60
  • M
    Muhammad Abdur.Rahman Khan 30 - Aug - 2024 03 Min 51 Sec 45/60
  • H
    Hira Maqsood 20 - Feb - 2024 07 Min 03 Sec 45/60
  • S
    suzi 09 - Feb - 2026 01 Min 42 Sec 44/60
  • M
    M.Faiq 22 - May - 2024 02 Min 46 Sec 40/60
  • M
    Muhammad Sadaqat 10 - Mar - 2023 03 Min 54 Sec 40/60
  • H
    Haseeb Ur Rehman raja 25 - Jun - 2024 05 Min 10 Sec 40/60

ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
2 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
3 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
4 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
5 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
6 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
7 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
8 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
9 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
10 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light

Test Questions