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प्रश्न
List in proper sequence the steps of the experiment for determining the approximate focal length of a given concave mirror by obtaining the image of a distant object.
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उत्तर
(i) Fix the concave mirror on the stand and place it on table facing towards a distant object.
(ii) Arrange the screen on the table so that the image of the distant object is obtained on it.
(iii) Measure the distance between the mirror and the screen using a metre scale. This distance is the focal length (F) of the mirror.
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संबंधित प्रश्न
Light travels more quickly through water than through glass.
If a ray of light passes from glass into water, which way will it bend : towards the normal or away from the normal?
Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.
State two factors on which the lateral displacement of the emergent ray depends.
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of incidence?
Image is formed by a mirror due to refraction of light.
What is the cause of refraction of light when it passes from one medium to another?
Fill in the blank and Explain the completed sentences.
The change in ______ of light rays while going from one medium to another is called refraction.
The angle of incidence for a ray of light having zero reflection angle is ______.
Which surface will not reflect most of the light falling on them?
Match the following:
| Column I | Column II | ||
| 1. | r > 90 | a. | Light gazes at the surface of separation between the two modes. |
| 2. | r = 90 | b. | No refraction. |
| 3. | r < 90 | c. | Refracted ray away from the normal |
