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

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 2

Wave length of light, on the average, is given by:

Question # 3

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 4

Frequency of red color as compared to that of violet color is:

Question # 5

Stars twinkle due to

Question # 6

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 7

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Question # 8

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:

Question # 9

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

Question # 10

A magnifier gives an image which is:

Question # 11

The least distance of distinct vision is:

Question # 12

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

Question # 13

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 14

The size of the image is maximum when its distance from the magnifying glass is:

Question # 15

The distance from eye to near point is taken as:

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 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
2 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
A. Equal to
B. Greater than
C. Smaller than
D. None of these
3 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
4 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
5 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
6 According to Huygen's principle
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
7 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
8 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:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
9 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
10 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these

Test Questions

Is this page helpful?