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Penumbra

Fill in the b...

Question

Fill in the blank :
The colour of an opaque object is the colour of light which it _____.

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Solution

The colour of an opaque object is the colour of light which it reflects.

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Q. Choose an appropriate word and fill in the blanks.
(a) A ........... is a natural source of light.
(b) A ......... is an artificial source of light.
(c) When light passes through a prism, it gets separated into ....... colours.
(d) The image obtained in the pinhole camera is ......... .
(e) A shadow is formed when an ........... object comes in the way of light.
(f) When a ........... object comes in the way of light, light passes ......... it.
(options : seven, star, through, transparent, opaque, colors, shape, erect, inverted, luminous, candle)

Q. Fill in the blanks with suitable words :
(a) When a ray of light enters a prism, it bends ___ the normal ; as it leaves the prism, it bends ___ the normal.
(b) White light is composed of ___ colours. The colour of white light deviated through the largest angle by a prism is ___

State whether true or false.

The shadow formed by a red opaque object is red in colour.

Q. Fill in the blanks using the correct word given in the bracket:
1. Light is a form of ............................ . (energy/electricity)
2. All bodies which emit light energy by themselves are called ............................ bodies. (luminous/opaque)
3. Light travels in a ............................ line. (straight/curved)
4. A glowing electric bulb is an example of ............................ source of light. (natural/artificial)
5. Any polished surface from which regular reflection takes place is called a ............................ . (mirror/obstacle)
6. Reflection from a mirror gives clear ............................ . (image/shadow)
7. The shadow of a coloured object is ............................ . (coloured/black)
8. The image formed by a mirror is due to ............................ of light. (reflection/ propagation)

Q. The colour of an opaque object is due to the colour it :

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