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प्रश्न
When a light ray passes from air into glass, what happens to its speed? Draw a diagram to show which way the ray of light bends.
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उत्तर
When a ray of light travels from a rarer medium to a denser medium (air into glass), its speed decreases and it bends towards the normal.
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संबंधित प्रश्न
| Column I | Column II | Column III | |
| 1 | Dispersion | Long-sightedness | Twinkling of stars |
| 2 | Refraction | Splitting of white light into component colours | Convex lens |
| 3 | Hypermetropia | Change in the direction of the ray of light due to change in medium | Spectrum of seven colours |
State the uses of plane mirrors.
The image in a plane mirror is virtual and laterally inverted. What does this statement mean?
A man stands 10 m in front of a large plane mirror. How far must the walk before he is 5 m away from his image?
If a ray of light goes form a denser medium to a rarer medium, will it bend towards the normal or away from the normal?
With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab, the emergent ray is parallel to the incident ray.
Water is optically denser than glass.
Air is optically .......... than glass.
What do you understand by refraction of light?
Choose and write the correct option.
If we gradually increase the angle of incidence of a ray of light passing through prism then …..
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.
The phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.
The incident rays and refracting rays are on opposite sides of the normal.
The speed of light varies in different media.
The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.
In the above diagram light is travelling through different media. It is noted by a scientist that ∠1= ∠3 = ∠4 but ∠2 < ∠1. Which of the following statement would be correct?
Which object use the reflection of light?
Which surface will not reflect most of the light falling on them?
The bending of light as it passes from one medium to another is called ______.
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
