question_answer 1)
The diagram shows an object O viewed using two mirrors. A person looks into the mirrors as shown. At which position is the image of O seen?
A)
a done
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B)
b done
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C)
c done
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D)
d done
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question_answer 2)
When Abhishek looked at a lighted torch through an object he could see a faint glow, but not the torch. The object is
A)
Transparent done
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B)
Opaque done
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C)
Translucent done
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D)
None of these done
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question_answer 3)
Which of the following explains why air is not visible?
A)
It is nearly a perfect transparent substance. done
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B)
It neither absorbs nor reflects light. done
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C)
It transmits whole of light. done
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D)
All of these. done
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question_answer 4)
A girl is 4 m away from the plane mirror. If she moves few steps closer to the mirror, what will happen to the image size in the mirror?
A)
The size of image will decrease. done
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B)
The size of image will increase. done
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C)
The size of image will be the same. done
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D)
Cannot say. done
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question_answer 5)
A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is
A)
Parallel done
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B)
Convergent done
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C)
Divergent done
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D)
None of these done
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question_answer 6)
Study the set-up below.
How will the shadow look like?
A)
B)
C)
D)
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question_answer 7)
There is no dark shadow formed by the glass when light is shone on it. This is because
A)
It is not night time yet. done
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B)
The light is not strong enough. done
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C)
The glass is a transparent object. done
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D)
The distance between glass and screen is very large. done
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question_answer 8)
Which of the following statements is true?
A)
The image formed by a pinhole camera is inverted because light travels in a straight line. done
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B)
Light does not change its direction on reflection. done
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C)
As we move the object away from the light source, the shadow of the object becomes smaller. done
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D)
Reflection is possible only from polished surface. done
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question_answer 9)
Fill in the blanks with most appropriate option.
Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the earth. This is due to the reason that the ___(i)___, the region of complete ___(ii)___ is not able to reach the earth. The region of partial ___(iii)___, that is the ___(iv)___ reaching the earth is too large and too faint to be visible to us.
A)
B)
C)
D)
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question_answer 10)
Which of the items above will allow you to see around a corner from where you are standing?
A)
(i) only done
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B)
(iii) only done
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C)
(i) and (ii) done
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D)
(i) and (iii) done
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question_answer 11)
You are standing upright in a room in front of a vertical mirror. In this mirror, you can see from your position, only the upper two- third part of your body. You wish to see the full image of your body in the mirror. Which combination of the following three courses of action will achieve this?
I. Move away from the mirror II. Move towards the mirror III. Use a mirror whose height will allow you to see your full image
A)
I only done
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B)
II only done
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C)
III only done
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D)
Either I or III done
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question_answer 12)
The mirror image of TRANSPARENT will be
A)
B)
TRANSPARENT done
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C)
D)
TNERAPSNART done
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question_answer 13)
Vijay puts some water into four cups made of steel, porcelain, glass, frosted glass. Which one of these cups will allow him to see the level of the water clearly?
A)
Glass cup done
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B)
Steel cup done
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C)
Porcelain cup done
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D)
Frosted glass cup done
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question_answer 14)
Three sticks are placed in an open field as shown in figure. Which of the following sticks will form the shadow of equal length?
A)
Only sticks (I) and (II) done
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B)
Only sticks (II) and (III) done
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C)
Only sticks (I) and (III) done
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D)
All sticks (I), (II) and (III). done
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question_answer 15)
Nisha placed a stick in the playground at 8:15 am in the morning. How will the shadow of the stick at 12:00 noon be in comparison to the one at 8:15 am?
A)
It will be shorter than one at 8:15 am. done
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B)
It will be same as one at 8:15 am. done
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C)
It will be greater than one at 8:15 am. done
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D)
Shadow will not form at 12:00 noon. done
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question_answer 16)
Look at the Venn diagram. Which of the following objects described below are most likely to be I, II and III? Choose the correct option.
A)
B)
C)
D)
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question_answer 17)
A solid transparent sphere has a small opaque dot at its centre. When observed from outside, the apparent position of the dot will be
A)
Closer to the eye than its actual position. done
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B)
The same as its actual position. done
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C)
Farther away from the eye than its actual position. done
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D)
None of these. done
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question_answer 18)
Geeta placed three objects made of different materials as shown in the figure. She observed a bright spot of light at (II) but (III) would not get any spot.-Then,
A)
(I) and (II) are made of transparent materials and (III) is made of opaque material. done
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B)
(I) is made of transparent material, (II) is made of translucent material and (III) is made of opaque material. done
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C)
(I) is made of transparent material, (II) is made of opaque material and (III) is made of either transparent or opaque or translucent material. done
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D)
(I) and (II) are made of opaque material and (III) is made of transparent material. done
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question_answer 19)
Riya and Priya were sitting around a round table. They noticed that they could see their own and each other's image onto the table top. Then table top is made of
A)
Unpolished wood, covered with white cloth done
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B)
Polished glass of red colour done
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C)
Glass covered with cellophane paper done
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D)
Smoked glass covered with green colour cloth. done
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question_answer 20)
Read the given statements and select the correct option,
Statement 1: Rahul placed a colored plastic bottle in front of the beam of a torch light. Then he placed a transparent sheet of same size on the other side of bottle. No shadow will form on the screen. Statement 2: Translucent objects allow light to pass through them partially.
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
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B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
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C)
Statement 1 is true but statement 2 is false. done
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D)
Statement 1 is false but statement 2 is true. done
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