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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
Fill in the blank.
The darkest 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.
Tick the correct answer.
Umbra is a region of
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?
Sivarajan placed a meter stick in the playground at 7.00 am in the morning. How will the shadow of the stick at noon look in comparison to the one in the morning
What are the properties of shadow?
______ is always against, opposite side of light source.
The ______ is the darkest part of a shadow.
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?
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.
