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प्रश्न
What is meant by ‘refraction of light’?
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उत्तर
The change in direction of light when it passes from one medium to another obliquely is called refraction of light.
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संबंधित प्रश्न
What is refraction of light?
Which type of reflection of light leads to the formation of images?
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?
Why does a ray of light bend when it travels from one medium to another?
Light travels more quickly through water than through glass.
- Which is optically denser: water or 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.
Light travelling from a denser medium to a rarer medium along a normal to the boundary:
(a) is refracted towards the normal
(b) is refracted away from the normal
(c) goes along the boundary
(d) is not refracted
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
How does the light have to enter the glass:
for no refraction to happen?
Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:
(a) a concave mirror, and (b) a convex mirror
Identify the wrong figure from the following.
Explain with diagrams how refraction of incident light takes place from
- rarer to denser medium
- denser to rarer medium
- normal to the surface separating the two media.
Numerical problems.
The speed of light in water is 2.25 × 108 ms–1. If the speed of light in vacuum is 3 × 108 ms–1, calculate the refractive index of water.
The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.
When light passes from one medium to another the ray gets bent. This property of light is called ______.
How does the light travel?
Light travels fastest in a vacuum. Why?
A normal is an imaginary line drawn ________ to the boundary at the point of incidence.
The constant \[\frac{\sin i}{\sin r}\] for a given pair of media is called the:
