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प्रश्न
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.
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उत्तर
A → a; B → b
As the position of torch changes, we can observe the change in shape of shadow.
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संबंधित प्रश्न
Select the correct alternative.
Umbra is a region of
Select the correct alternative.
Penumbra is a region of
Draw a ray diagram to show the formation of the shadow of an opaque object by a point source of light. How is the size of shadow affected if the screen is moved away from the object?
State two differences between an umbra and a penumbra.
Draw a ray diagram to show the formation of umbra alone.
Draw a ray diagram to show the formation of umbra and penumbra both. Label the parts umbra and penumbra in your diagram.
Why is it that the birds flying in the sky do not cast their shadow on the earth?
Answer the following.
How is a shadow formed? Write the conditions required for a shadow to form.
What is penumbra?
What are the essential conditions for the formation of shadow?
How does the colour of an opaque object affect the colour of the shadow?
What do we need in order to see a shadow?
What are the parts of shadow?
What are the properties of shadow?
______ is always against, opposite side of light source.
The lighter shade of shadow is the ______.
Which of the following can never form a circular shadow?
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.
