GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 018
171). If you walk towards a plane mirror at a speed of 10 cm/s, at what speed does your image approach you?
A). 5 cm/s
B). 10 cm/s
C). 20 cm/s
D). information inadequate
Answer: 20 cm/s
172). If you stand in a room, where two adjacent walls are covered with plane mirrors, the total number of your images formed will be
A). 2
B). 3
C). 4
D). infinite
Answer: 3
173). What type of mirror can be used to obtain the real image of an object?
A). plane mirror
B). concave mirror
C). convex mirror
D). no mirror can produce a real image
Answer: concave mirror
174). Which of the following can be used as a burning glass?
A). plane mirror
B). convex mirror
C). concave lens
D). concave mirror
Answer: concave mirror
175). A dentist's mirror is a
A). cylindrical mirror
B). plane mirror
C). convex mirror
D). concave minor
Answer: concave minor
176). For the rear view, motorists use
A). plane mirror
B). concave mirror
C). convex mirror
D). cylindrical mirror
Answer: convex mirror
177). The type of mirror used in the headlamps of cars is the
A). plane mirror
B). spherical convex mirror
C). spherical concave mirror
D). parabolic concave mirror
Answer: parabolic concave mirror
178). Assertion: A pool of water looks shallower than it actually is
Reason: Light bends towards the normal while travelling from water to air
A). Both A and R correct, and R explains A
B). Both A and R correct, but R does not explain A
C). A is right, R is wrong
D). A is wrong, R is right
Answer: A is right, R is wrong
179). When a pencil is partly immersed in water in a slanting position, the immersed portion appears
A). bent towards the bottom
B). bent towards the water surface
C). bent in a zigzag manner
D). curved downward
Answer: bent towards the water surface
180). The sun remains visible for some time after it actually sets below the horizon. This happens due to
A). atmospheric refraction
B). scattering of light
C). dispersion
D). persistence of vision
Answer: atmospheric refraction
A). 5 cm/s
B). 10 cm/s
C). 20 cm/s
D). information inadequate
Answer: 20 cm/s
172). If you stand in a room, where two adjacent walls are covered with plane mirrors, the total number of your images formed will be
A). 2
B). 3
C). 4
D). infinite
Answer: 3
173). What type of mirror can be used to obtain the real image of an object?
A). plane mirror
B). concave mirror
C). convex mirror
D). no mirror can produce a real image
Answer: concave mirror
174). Which of the following can be used as a burning glass?
A). plane mirror
B). convex mirror
C). concave lens
D). concave mirror
Answer: concave mirror
175). A dentist's mirror is a
A). cylindrical mirror
B). plane mirror
C). convex mirror
D). concave minor
Answer: concave minor
176). For the rear view, motorists use
A). plane mirror
B). concave mirror
C). convex mirror
D). cylindrical mirror
Answer: convex mirror
177). The type of mirror used in the headlamps of cars is the
A). plane mirror
B). spherical convex mirror
C). spherical concave mirror
D). parabolic concave mirror
Answer: parabolic concave mirror
178). Assertion: A pool of water looks shallower than it actually is
Reason: Light bends towards the normal while travelling from water to air
A). Both A and R correct, and R explains A
B). Both A and R correct, but R does not explain A
C). A is right, R is wrong
D). A is wrong, R is right
Answer: A is right, R is wrong
179). When a pencil is partly immersed in water in a slanting position, the immersed portion appears
A). bent towards the bottom
B). bent towards the water surface
C). bent in a zigzag manner
D). curved downward
Answer: bent towards the water surface
180). The sun remains visible for some time after it actually sets below the horizon. This happens due to
A). atmospheric refraction
B). scattering of light
C). dispersion
D). persistence of vision
Answer: atmospheric refraction
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