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प्रश्न
State the uses of plane mirrors.
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उत्तर
Uses of a plane mirror:
- Plane mirrors are used to see ourselves. Example, mirrors in a bathroom.
- Plane mirrors are fixed on the inner walls of certain shops ( like jewellery shops) to make them look bigger.
- Plane mirrors are fitted at blind turns of some busy roads so that drivers can see the vehicles coming from the other side and prevent accidents.
- Plane mirrors are used in periscopes.
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संबंधित प्रश्न
What is meant by 'reflection of light'?
An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the positions of the original and final images seen in the mirror is ______.
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?
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
Fill in the following blank with suitable word:
Light bends when is passes from water into air. We say that it is ............
With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is.
State two factors on which the lateral displacement of the emergent ray depends.
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.
Define the principal focus of a concave mirror.
Write scientific reason.
The coin disappears in a vessel as it is seen from a specific location. But as soon as the water is poured into the vessel to a certain level, the coin appears.
Explain the working of a periscope.
State whether true or false. If false, correct the statement.
The angle of deviation depends on the refractive index of the glass.
The refractive index of a transparent medium is always greater than ______.
When light passes from one medium to another the ray gets bent. This property of light is called ______.
Light is refracted or bent while going from one medium to another because of its ______ changes.
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
Which is optically denser out of the two medium M1& M2 having the refractive indices = 1.71 and 1.36 respectively?
Under what circumstances there won’t be any refraction of light when it enters from one medium to another?
