EASY
Earn 100

Explain about penumbra.

Important Questions on Light

MEDIUM
Differentiate between umbra and penumbra region of a shadow.
EASY
Choose the answer from the bracket to fill the blank.
The sun rays fall _____ on the earth during noon time. (directly/slantly). 
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_____ (Opaque/Transparent) objects form a dark shadow.
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A shadow shows details of the object.
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Shadow of an object gives an idea about _____.
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State two differences in the pinhole camera images and shadows.
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A dark patch formed behind an opaque material is called a/an _______.
MEDIUM
 The dark spot formed by a translucent or opaque object when it blocks light _____.
EASY
Shadows are formed because 
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Shadows are formed when light is blocked by:
EASY
The earth's shadow has five parts.
MEDIUM
Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?
MEDIUM

What conclusion do you get from the fact that when an object is placed in the path of light, a shadow is formed behind the object?

EASY
Which of these materials would form a shadow?
HARD
List down the features of a shadow.
EASY
Name the parts of the shadow formed by an extended source of light. (umbra and antumbra / umbra and penumbra)
EASY
A shadow is formed when:
MEDIUM
If the object is red in colour, the shadow will also be red.
MEDIUM
Shadows are always inverted.
EASY

Study the diagram given alongside. Which of the following will be seen on the screen?

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