GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 019
181). If there were no atmosphere, the length of the day would
A). decrease
B). remain unaffected
C). increase
D). be almost half
Answer: decrease
182). The sun and moon appear elliptical near the horizon due to
A). optical illusion
B). interference
C). refraction
D). actual change in shapes
Answer: refraction
183). The twinkling of stars can be partly attributed to
A). intermittent shining
B). convection currents in the atmosphere
C). atmospheric refraction
D). the unstable motion of the earth
Answer: atmospheric refraction
184). Planets do not twinkle because
A). they emit light continuously
B). they are luminous sources of light
C). they are nearer to us and therefore their light does not pass through the atmosphere
D). they are nearer to us and therefore minor variation in their intensity: are not noticeable
Answer: they are nearer to us and therefore minor variation in their intensity: are not noticeable
185). A rainbow is formed by the _____ of light by water droplets.
A). dispersion
B). scattering
C). total internal reflection
D). dispersion and total internal reflection
Answer: dispersion and total internal reflection
186). After a shower of rain, a rainbow is seen
A). towards the sun
B). opposite the sun
C). anywhere, irrespective of the position of the sun
D). even in the absence of the sun
Answer: opposite the sun
187). When white light passes through a glass prism, it gets dispersed into colours because
A). glass imparts colours to the light
B). different colours have different speeds in glass
C). interference of light occurs
D). diffraction of light occurs
Answer: different colours have different speeds in glass
188). Which of the following is the proper sequence of colours?
A). violet, blue, red
B). green, orange, red
C). red, green, indigo
D). blue, green, yellow
Answer: blue, green, yellow
189). What are primary colours?
A). colours of the rainbow
B). colours in the spectrum of white light
C). colours which cannot be produced by mixing other colours
D). colours found in nature
Answer: colours which cannot be produced by mixing other colours
190). The three primary colours are
A). blue, green and red
B). blue, yellow and red
C). yellow, orange and red
D). violet, indigo and blue
Answer: blue, green and red
A). decrease
B). remain unaffected
C). increase
D). be almost half
Answer: decrease
182). The sun and moon appear elliptical near the horizon due to
A). optical illusion
B). interference
C). refraction
D). actual change in shapes
Answer: refraction
183). The twinkling of stars can be partly attributed to
A). intermittent shining
B). convection currents in the atmosphere
C). atmospheric refraction
D). the unstable motion of the earth
Answer: atmospheric refraction
184). Planets do not twinkle because
A). they emit light continuously
B). they are luminous sources of light
C). they are nearer to us and therefore their light does not pass through the atmosphere
D). they are nearer to us and therefore minor variation in their intensity: are not noticeable
Answer: they are nearer to us and therefore minor variation in their intensity: are not noticeable
185). A rainbow is formed by the _____ of light by water droplets.
A). dispersion
B). scattering
C). total internal reflection
D). dispersion and total internal reflection
Answer: dispersion and total internal reflection
186). After a shower of rain, a rainbow is seen
A). towards the sun
B). opposite the sun
C). anywhere, irrespective of the position of the sun
D). even in the absence of the sun
Answer: opposite the sun
187). When white light passes through a glass prism, it gets dispersed into colours because
A). glass imparts colours to the light
B). different colours have different speeds in glass
C). interference of light occurs
D). diffraction of light occurs
Answer: different colours have different speeds in glass
188). Which of the following is the proper sequence of colours?
A). violet, blue, red
B). green, orange, red
C). red, green, indigo
D). blue, green, yellow
Answer: blue, green, yellow
189). What are primary colours?
A). colours of the rainbow
B). colours in the spectrum of white light
C). colours which cannot be produced by mixing other colours
D). colours found in nature
Answer: colours which cannot be produced by mixing other colours
190). The three primary colours are
A). blue, green and red
B). blue, yellow and red
C). yellow, orange and red
D). violet, indigo and blue
Answer: blue, green and red
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