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प्रश्न
Select the correct alternative.
Penumbra is a region of
पर्याय
complete darkness
complete brightness
partial brightness
none of the above
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उत्तर
partial brightness
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संबंधित प्रश्न
Select the correct alternative.
Umbra is a region of
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 umbra on the screen.
State the conditions when only the penumbra of an opaque object is obtained on the screen.
Why is it that the birds flying in the sky do not cast their shadow on the earth?
Tick the correct answer.
Umbra is a region of
What is shadow?
What is penumbra?
What do we need in order to see a shadow?
What are the properties of shadow?
What is a shadow? What things are necessary for the formation of a shadow?
On a sunny day, does a bird or an aeroplane flying high in the sky cast its shadow on the ground? Under what circumstances can we see their shadow on the ground?
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.
