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प्रश्न
What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror?
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उत्तर
| Photograph | Image in a Plane Mirror |
| A photograph is made when a real image is projected on a photographic film. | The image formed by a plane mirror is virtual and cannot be taken on a photograph. |
| The image is smaller in size compared to the actual object. | The image is the same size as the object. |
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संबंधित प्रश्न
If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?
What is lateral inversion? Explain by giving a suitable example.
With the help of a labelled ray-diagram, describe how a plane mirror forms an image of a point source of light placed in front of it. State the characteristics of the image formed in a plane mirror.
A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
The speed of light is more in glass than in water.
Water is optically .......... than air.
Match the Following
| Column A | Column B |
| (a) white Light | (1) Convex mirror |
| (b) Refraction | (2) Concave mirror |
| (c) Virtual images | (3) refraction |
| (d) Real images | (4) spectrum |
| (e) Prism | (5) ray of light from glass to air |
The diagram (figure) given below shows two parallel rays 1 and 2 incident on (a) a concave mirror, (b) a convex mirror. Draw the reflected rays and mark the focus by the symbol F.
Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s−1.
The size of image of an object by a convex lens of focal length 20 cm is observed to be reduced to `1/3` rd of its size . Find the distance of the object from the optical centre of the lens .
Explain how the formation of a rainbow occurs.
Observe the given figure and write appropriate phenomenon of light in the box.
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 surface will not reflect most of the light falling on them?
How does the light travel?
A star appears twinkling into the sky because of the reflection of light by the atmosphere.
Mirage is an example of refraction and the total internal reflection of light.
The bottom of swimming pool appears to be less deep than the actual one because of
