Advertisements
Advertisements
प्रश्न
Define the term Principle axis.
Advertisements
उत्तर
The principal axis is the straight line passing through the pole and the centre of curvature.
संबंधित प्रश्न
Select the correct alternative
The property due to which a light ray striking a surface is returned back into the same medium is called
What do you mean by the term reflection of light ?
Explain the following term:
Reflected ray. Draw diagram/diagrams to show them.
Why are infinite images not seen when two plane mirrors are facing each other?
Draw diagrams to show the difference between regular and irregular reflection.
A converging mirror, forms three times magnified virtual image when an object is placed at a distance of 8 cm from it. Calculate:
- the position of the image
- the focal length of the mirror.
______ through which light can pass partially.
Figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is
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.
