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प्रश्न
Three torches A, B and C shown in the following figure are switched on one by one. The light from which of the torches will not form a shadow of the ball on the screen.
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उत्तर
The light from torch C will not form a shadow of the ball on the screen. Torch C is parallel to the screen and light travels in straight line.
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संबंधित प्रश्न
Select the correct alternative.
Umbra is a region of
Select the correct alternative.
Penumbra is a region of
What is a shadow? Give a reason for its formation.
State two differences between an umbra and a penumbra.
Draw a ray diagram to show the formation of umbra alone.
In the following diagram, draw rays to form a penumbra on the screen.
Tick the correct answer.
Umbra is a region of
What is shadow?
What is penumbra?
When does a shadow form?
What do we need in order to see a shadow?
Rearrange the boxes given below to make a sentence that helps us understand opaque objects.
| O W S | A K E | O P A Q | U E O | B J E T | T S M |
| S H A D |
______ is always against, opposite side of light source.
Correct the following statements.
- The colour of the shadow of an object depends on its colour of the object.
- Transparent objects allow light to pass through them partially.
A torch is placed at two different positions A and B, one by one, as shown in the following figure.
The shape of the shadow obtained in two positions is shown in the following figure.
Match the position of the torch and shape of the shadow of the ball.
A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes the shadow was not obtained. Explain.
