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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
00:00
Question # 1
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
Question # 2
The contrast in the fringes in an interference pattern depends upon
Question # 3
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 4
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 5
Angle between the ray of light and the corresponding wavefront is:
Question # 6
A line which represents the direction of travel of a wave is known as:
Question # 7
Huygen principle is used to determine:
Question # 8
Huygen's principles states that:
Question # 9
A virtual image is formed when object is placed:
Question # 10
Resolving power in mth order diffraction for grating is given by:
Question # 11
Laws of reflection and refraction can also be explained by:
Question # 12
Electromagnetic waves transport:
Question # 13
A ray passing through optical center of a lens, after refraction:
Question # 14
The locus of all points in a medium having same phase of vibration is called
Question # 15
The magnifier forms a virtual image of the object at:
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H Heer 21 - Jan - 2024 00 Min 29 Sec 60/60 -
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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 | When a source of light isat very large distance,the shape of wavefront is: |
A. Spherical
B. Cylindrical
C. Plane
D. None of these
|
| 2 | Least distance of distinct vision of an old man possibly becomes: |
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
|
| 3 | Resolving power in mth order diffraction for grating is given by: |
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
|
| 4 | 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
|
| 5 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 6 | 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
|
| 7 | Electromagnetic waves transport: |
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
|
| 8 | If the object is situated at focus of a convex lens, then its image is formed at: |
A. F
B. 2F
C. Infinity
D. None of these
|
| 9 | 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
|
| 10 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Smaller
B. Larger
C. Zero
D. None of these
|
Test Questions