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प्रश्न
Explain how to read the following message which was found on some blotting paper:
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उत्तर
Place a plane mirror in front of the message and see the image of the message. The mirror now reads as 'meet me at midnight'. The phenomenon of lateral inversion is used here..
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संबंधित प्रश्न
A wall reflects light and a mirror also reflects light. What difference is three in the way they reflect light?
Which type of reflection of light leads to the formation of images?
State the uses of plane mirrors.
If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?
A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
Fill in the following blank with suitable word:
Light bends when is passes from water into air. We say that it is ............
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
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.
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
Light travels at a lower speed in water than in air.
When a ray of light travels from water to air, it bends ............. the normal.
What do you understand by refraction of light?
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.
Explain how the formation of a rainbow occurs.
Choose the correct option from given alternative:
A real image is formed by the light rays after reflection or refraction when they:
(A) actually meet or intersect with each other.
(B) actually converge at a point
(C) appear to meet when they are produced in the backward direction.
(D) appear to diverge from a point.
Which of the above statements are correct?
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?
Mirage is an example of refraction and the total internal reflection of light.
How do twinkling stars occur? (or) what is the cause of the twinkling of stars?
