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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 ................
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.
In the following diagram, draw rays to form a penumbra on the screen.
Why is it that the birds flying in the sky do not cast their shadow on the earth?
What is shadow?
When does a shadow form?
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?
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.
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.
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?
