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प्रश्न
What do you understand by the Light?
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उत्तर
Light is a form of energy that produces in us the sensation of seeing.
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संबंधित प्रश्न
Explain the following term:
Angle of reflection. Draw diagram/diagrams to show them.
Draw a diagram to show the reflection of a ray of light using a plane mirror. In the diagram, label the incident ray, the reflected ray, the normal, the angle of incidence and the angle of reflection.
Give two uses of concave mirror.
In the figure is shown a concave mirror. A is a point on the principal axis. If an object O is kept at A, image is formed on A itself. Copy the diagram. Draw the image in the diagram. Is the image real or virtual?
Measure the distance PA and write it in the diagram. What is the distance PA called?
Mark a point B on the principal axis, at which, if a point source of light is kept, the rays travel parallel to principal axis after reflection from M. What is point B called?
Find the odd one.
glass bottle, exam pad, paper plate, wooden board
Say TRUE or FALSE
We see a book because it reflects the light that falls on its surface
Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.
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.
