91
The effect of which, light turns on the boundary between two mediums is:
A)
scattering
B)
reflection
C)
refraction
D)
variance
Answer & Solution
Answer: Option
C
92
Which of the following is not related to heat flow?
A)
conducive
B)
refractive
C)
radiative
D)
convective
Answer & Solution
Answer: Option
B
93
A lens with power + 2D will have a focal length of . . . . . . . .
A)
40 m
B)
50 m
C)
40 cm
D)
50 cm
Answer & Solution
Answer: Option
D
94
Blue colour of the sky is due to
A)
Scattering of light
B)
Dispersion of light
C)
Interference of light
D)
Emission of more blue light as compared to other colours by the sun
Answer & Solution
Answer: Option
A
95
The correct order of colours in a rainbow is
A)
Blue, green, violet
B)
Violet, green, blue
C)
Blue, yellow, green
D)
Blue, green, yellow
Answer & Solution
Answer: Option
D
96
In order to avoid Sunlight, which of the following colour combination for an umbrella is most appropriate?
A)
Top black and bottom white
B)
Top white and bottom black
C)
Only black
D)
Only white
Answer & Solution
Answer: Option
B
97
For a person with hypermetropia or farsightedness, the near point, is . . . . . . . . Farther away from the normal near point.
A)
27 cm
B)
26 cm
C)
25 cm
D)
24 cm
Answer & Solution
Answer: Option
C
98
Purpose of an optical filter is to
A)
reflect lights of different colours
B)
dispense light into component colours
C)
refract light of different colours
D)
transmit or absorb light of different colours
Answer & Solution
Answer: Option
D
99
The splitting of different colours of light in a prism is
A)
Reflection of light
B)
Dispersion of light
C)
Diffraction of light
D)
Refraction of light
Answer & Solution
Answer: Option
B
100
The twinkling of stars at night is caused by . . . . . . . .
A)
Atmospheric refraction
B)
Dispersion of light
C)
Reflection of light
D)
Scattering of light
Answer & Solution
Answer: Option
A
