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प्रश्न
What is a shadow? What things are necessary for the formation of a shadow?
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उत्तर
- Shadows are formed because light travels in straight lines.
- Shadow is always against, opposite side of light source.
- Shadow is formed by opaque objects that stop high from propagating.
- Things necessary for the formation of shadow: source of light, opaque object
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संबंधित प्रश्न
Fill in the blank.
The darkest portion of a shadow is called the ................
Fill in the blank.
The less dark portion of a shadow is called the .................
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?
Tick the correct answer.
Umbra is a region of
What are the essential conditions for the formation of shadow?
What are the parts of shadow?
What are the properties of shadow?
The ______ is the darkest part of a shadow.
Which of the following can never form a circular shadow?
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.
Three identical towels of red, blue and green colour are hanging on a clothes line in the sun. What would be the colour of shadows of these towels?
A football match is being played at night in a stadium with flood lights ON. You can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. Explain.
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.
