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

In the formula R = N x m for diffraction grating, N denotes:

Question # 2

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

Question # 3

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 4

When a source of light isat very large distance,the shape of wavefront is:

Question # 5

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

Question # 6

The terms phase difference and path difference are:

Question # 7

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

Question # 8

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 9

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

Question # 10

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 11

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

Question # 12

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 13

Huygen's theory cannot explain

Question # 14

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 15

When the object lies between F and 2F, the image formed by is formed at:

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
  • H
    Hamza Mukhtair 19 - Jul - 2022 00 Min 49 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
  • 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 If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
2 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
3 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
4 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
5 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
6 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
7 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
8 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
9 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
10 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!