Displaying 5 out
of 41
questions & answers.
Q1.
Write true or false for each statement:
- The image formed by a plane mirror is real.
- When a light ray is reflected from a wall, the angle of incidence is not equal to the angle of reflection.
- The image of the right hand in a plane mirror looks like that of a left hand.
- The image formed by plane mirror is upright.
- The image formed by a plane mirror can be obtained on a screen.
- The objects around us are seen due to irregular reflection of light.
- The speed of light in vacuum is 3 x 108 m s-1.
- A rose appears red in light of all the colours.
- A black paper absorbs light of all the colours and reflects none.
- The primary colours are red, blue and green.
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Answer:
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- False
- False
- True
- True
- False
- True
- True
- False
- True
- True
Q2.
Fill in the blanks:
- Angle of incidence = _______________.
- The incident ray, the reflected ray and the normal lie _______________.
- The image formed by a plane mirror is at a distance behind the mirror as _______________.
- The image formed by a plane mirror is _______________ and _______________.
- We are able to see the objects around us due to _______________ reflection.
- A _______________ image cannot be obtained on a screen.
- One surface of mirror is made opaque by _______________ it followed by a thin coating of paint of lead oxide.
- A plane mirror ______________ reflect 100 percent light falling on it.
- The colour of an opaque object in the colour of of light which _______________.
- Magenta, cyan and yellow are the _______________ colours.
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Answer:
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- angle of reflection
- in one plane
- the object in front of it
- virtual, erect
- irregular
- virtual
- silvering
- does not
- reflects
- secondary
Q3.
Match the following:
| Column A | Coulmn B |
| (a) A light ray passes from air to glass | (i) speeds up |
| (b) A light ray passes from glass to water | (ii) reflects red light |
| (c) Virtual image | (iii) primary colours |
| (d) Red rose | (iv) plane mirror |
| (e) Red, green and blue | (v) slows down |
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Answer:
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- (v) slows down
- (i) speeds up
- (iv) plane mirror
- (ii) reflects red light
- (iii) primary colours
Q4.
Select the alternatives:
- A man stands in front of a plane mirror, finds his image to be at a distance of 6 metres from himself. The distance of man from the mirror is:
- The angle between the incident ray and the ray reflected from the plane mirror is 70°. The angle of incidence will be:
- The image formed by a plane mirror is:
- The angle of incidence on a plane mirror is 30°. The angle of reflection will be:
- The angle of incidence on a plane mirror is 30°. The angle between the incident ray and the reflected ray is:
- The property due to which a light ray striking a surface is returned back into the same medium is called:
- A ray of light after reflection from a mirror is known as:
- The speed of light is maximum in:
- A red rose is seen in green light. It will appear:
- The primary colours are:
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Answer:
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- 6 metres
- 35º
- Virtual, erect and same size as that of the object
- 30º
- 60º
- Reflection of light
- Reflected ray
- Vacuum
- Black
- Red, Blue, Green
Q5.
What do you mean by the term reflection of light ?
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Answer:
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Reflection of light is a phenomenon of light in which the ray of light return to the same medium after striking a surface.






















































































