Entry Test MCQ :: Physical Optics
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| 1. |
Optical active crystals rotates the |
| A. |
vibrating plane |
B. |
polarization plane |
| C. |
diffraction plane |
D. |
interference plane |
Answer: Option B
Explanation:
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| 2. |
Which is not optically active? |
| A. |
sugar |
B. |
tartaric acid |
| C. |
water |
D. |
sodium chlorate |
Answer: Option C
Explanation:
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| 3. |
In double slit experiment we observe |
| A. |
interference fringes only |
B. |
diffraction fringes only |
| C. |
both interference and diffraction fringes |
D. |
polirized frringes |
Answer: Option C
Explanation:
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| 4. |
When light incident normally on thin film the path difference depends upon |
| A. |
thickness of the film only |
B. |
nature of the film only |
| C. |
angle of indidence only |
D. |
all thickness nature and angle of incidence |
Answer: Option D
Explanation:
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| 5. |
Which one of the following properties of light does not change with the nature of the medium? |
| A. |
velocity |
B. |
wavelength |
| C. |
amplitude |
D. |
frequency |
Answer: Option D
Explanation:
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| 6. |
Light reaches the earth form sun in nearly |
| A. |
15 minutes |
B. |
10 minutes |
| C. |
8 minutes |
D. |
8 minutes 30 seconds |
Answer: Option D
Explanation:
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| 7. |
Photoelectric effect was given by |
| A. |
Hertz |
B. |
Fresnel |
| C. |
Einstein |
D. |
Plank |
Answer: Option C
Explanation:
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| 8. |
According to Einstein light travels form one place to another in the form of |
| A. |
waves |
B. |
particles |
| C. |
photons |
D. |
it was not his discovery |
Answer: Option C
Explanation:
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| 9. |
Longitudinal waves do not exhibit |
| A. |
reflection |
B. |
refraction |
| C. |
diffraction |
D. |
polarization |
Answer: Option D
Explanation:
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| 10. |
Central spot of Newtons rings |
| A. |
bright |
B. |
dark for large wavelength |
| C. |
dark |
D. |
bright for large wavelength |
Answer: Option A
Explanation:
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