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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.
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
What do you mean by the term reflection of light ?
The following diagram shows a point object O placed in front of a plane mirror. Take two rays from the point O and show how the image of O is formed and seen by the eye.
Wirte down the letter C and I as seen in a plane mirror.
What is irregular reflection ? Give an example.
The angle of incidence is equal to the angle of reflection for perfect reflection.
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.
