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प्रश्न
Tick the correct answer.
Umbra is a region of
विकल्प
Partial darkness
Partial brightness
Complete brightness
Complete darkness
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उत्तर
Complete darkness
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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.
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.
When does a shadow form?
How does the colour of an opaque object affect the colour of the 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.
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 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.
