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प्रश्न
Compare the characteristics of an image formed by a convex mirror and a concave mirror, when object is beyond center of curvature, but not at infinity.
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उत्तर
Characteristics of the image formed by concave mirror when object is beyond the centre of curvature, but not at infinity are:
- Image formed is real.
- Image formed is inverted.
- Image formed is diminished.
- Image is formed between the centre of curvature (C) and principal focus (F), in front of the concave mirror.
Characteristics of the image formed by convex mirror when object is beyond centre of curvature, but not at infinity are :
- Image formed is virutal.
- Image formed is erect.
- Image formed is diminished.
- Image is always formed between pole and principal focus and behind the convex mirror.
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संबंधित प्रश्न
How is the position of image formed by a plane mirror related to the position of the object ?
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
The angle between an incident ray and the mirror is 350.
(i) What is the angle of incidence?
(ii) What is the angle of reflection?
(iii) What is the total angle turned by the ray of light?
(iv) What is the angle between the incident and the reflected rays?
______Surface reflects the light well.
______ through which light can pass completely.
What is Translucent objects? Give an example.
A point source of light S is placed in front of two large mirrors as shown. Which of the following observers will see only one image of S?

Play with a mirror
Write your name with a sketch pen on a thin sheet of paper, polythene or glass. Read your name on the sheet while standing in front of a plane mirror. Now look at your image in the mirror.
A burning candle in water
Take a shoe box, open on one side. Place a small lighted candle in it. Place a clear glass sheet (roughly 25 cm × 25 cm) in front of this candle figure. Try to locate the image of the candle behind the glass sheet. Place a glass of water at its position. Ask your friends to look at the image of the candle through the sheet of glass. Ensure that candle is not visible to your friends. Your friends will be surprised to see the candle burning in water. Try to explain the reason.

