| 1 |
If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will. |
- A. refract only
- B. reflect only
- C. partially refract and partially reflect
- D. Diffract only
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| 2 |
The ray of light striking to the side of prism is called: |
- A. refraction ray
- B. incident ray
- C. reflected ray
- D. emergent ray
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| 3 |
To see stomach problems we use: |
- A. Gastroscope
- B. Bronchoscope
- C. Cystoscope
- D. All of these
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| 4 |
The index of refraction depends on: |
- A. The focal length
- B. The speed of light
- C. the image distance
- D. The object distance
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| 5 |
If focal length of a lens is 1m, then its power will be: |
- A. 1 D
- B. 0.5 D
- C. 1.5 D
- D. 1 D
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| 6 |
Spherical mirrors are used in: |
- A. Medical
- B. Search light
- C. Microscope
- D. All of these
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| 7 |
Angle opposite to the base of triangle of prism is called: |
- A. angle of incidence
- B. angle of refraction
- C. angle of prism
- D. emerging angle
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| 8 |
A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance? |
- A. 5.0 cm
- B. 7.5 cm
- C. 15 cm
- D. 20 cm
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| 9 |
<p class="MsoNormal">A device which has two ways communication is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Television<o:p></o:p></p>
- B. <p class="MsoNormal">Radio<o:p></o:p></p>
- C. <p class="MsoNormal">Hard disk<o:p></o:p></p>
- D. <p class="MsoNormal">Mobile phone<o:p></o:p></p>
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| 10 |
The principal focus of a concave mirror is: |
- A. Virtual
- B. Real
- C. Imaginary
- D. Dual aspect
|