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प्रश्न
What do you understand by refraction of light?
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उत्तर १
The change in the direction of the path of light, when it passes from one transparent medium to another transparent medium, is called refraction of light.
उत्तर २
In essence, the refraction of light is a surface phenomenon. "When a ray of light travels from one optical medium to another, it changes the direction of the path of light, and this is called the refraction of light."
संबंधित प्रश्न
What is refraction of light?
What is lateral inversion? Explain by giving a suitable example.
A wall reflects light and a mirror also reflects light. What difference is three in the way they reflect light?
What is the difference between regular reflection of light and diffuse reflection of light?
A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth?
Explain why, though both a plane mirror and a sheet of paper reflect light but we can see the image of our face in a plane mirror but not in a sheet of paper.
The image of an object formed by a plane mirror is:
(a) virtual
(b) real
(c) diminished
(d) upside-down
A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
A ray of light travelling in air is incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the completer path of this ray of light. Mark the two points where the refraction of light takes place. What can you say about the final direction of ray of light?
Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.
A vertical ray of light strikes the horizontal surface of some water:
- What is the angle of incidence?
- What is the angle of refraction?
Light travels at a lower speed in water than in air.
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.
Write scientific reason.
The bottom of a pond appears raised.
State whether true or false. If false, correct the statement.
The angle of deviation depends on the refractive index of the glass.
What is refractive index?
The angle of incidence from air to glass at the point O on the hemispherical glass slab is.
The bending of light as it passes from one medium to another is called ______.
A ray of light traveling in medium 1 strikes and travels into another transparent medium 2. If the speed of light is greater in medium 1, the ray will ______.
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 |
