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MCQ's Test For ECAT Physics Chapter 9 Physical Optics
Try The MCQ's Test For ECAT Physics Chapter 9 Physical Optics
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 9 Physical Optics
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Question # 1
In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
Question # 2
The image of the tip of a needle is never sharp because of
Question # 3
A magnifier gives an image which is:
Question # 4
Angle between the ray of light and the corresponding wavefront is:
Question # 5
The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
Question # 6
In case of point, source of light shape of wavefront is:
Question # 7
The least distance of distinct vision is:
Question # 8
In the formula R = N x m for diffraction grating, N denotes:
Question # 9
Light has:
Question # 10
The ratio of the size of the image to that of object is called:
Question # 11
Monochromatic light means waves of:
Question # 12
The contrast in the fringes in an interference pattern depends upon
Question # 13
Which one of the following can act approximately as a source of monochromatic light;
Question # 14
Light appears to travel in straight line because
Question # 15
A grating with high resolving power can distinguish _______ difference in wavelengths :
Top Scorers Of ECAT Physics Chapter 9 Physical Optics MCQ`s Test
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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 | 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
|
| 2 | The locus of all the points in the same phase of vibration is called: |
A. Wave packet
B. Wave front
C. Wave number
D. None of them
|
| 3 | 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
|
| 4 | In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves: |
A. Greater than
B. Equal to
C. Smaller than
D. None of these
|
| 5 | 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
|
| 6 | When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears: |
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
|
| 7 | The locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 8 | 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
|
| 9 | Angle between the ray of light and the corresponding wavefront is: |
A. 0°
B. 60°
C. 90°
D. 120°
|
| 10 | 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
|
Test Questions
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