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प्रश्न
Define the term Principle axis.
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उत्तर
The principal axis is the straight line passing through the pole and the centre of curvature.
संबंधित प्रश्न
What do you mean by the term reflection of light ?
Wirte down the letter C and I as seen in a plane mirror.
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
Write down four characteristics of image formed in a plane mirror.
The reflection of a ray of light (OA) normally incident on a plane mirror is shown below
What are the angles of incidence and reflection?
Locate the image termed when the object is placed between two planes as shown in the following figure.
You can see a rainbow only when your back is towards the sun.
What kind of surface reflects light?
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.
