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WorksheetsHUMAN EYE AND THE COLORFUL WORLD
Total questions: 41
Worksheet time: 21mins
Angle of deviation is
angle by which incident ray deviates through prism
angle between incident ray and refracted ray
angle between incident ray and normal
angle of deviation will be maximum for-----colour
red
violet
green
which colour has least refractive index?
red
blue
violet
yellow
The separation of visible light into is different colours is known as __________________
displays
dispersion
reflection
refraction
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
Stars appear to be higher in the sky than actually they are because of
Scattering of light
Atmospheric refraction
Dispersion
Recombination of light
The stars twinkle but the planets do not twinkle at night because
The stars are small but the planets are large
The stars are large but the planets are small
The stars are much nearer but the planets are far away
The stars are far away but the planets are much nearer
The clear sky appears blue because
blue light gets absorbed in the atmosphere.
ultraviolet radiations are absorbed in the atmosphere.
violet and blue lights get scattered more than lights of all other colours by the atmosphere.
light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
is scattered the most by smoke or fog
is scattered the least by smoke or fog
is absorbed the most by smoke or fog
moves fastest in air
The angle between angle of incidence and the angle of emergence is called...........
angle of emergence
angle of prism
angle of deviation
critical angle
Assertion: Planets do not twinkle
Reason: Light rays do not come from planet
Assertion and reason are true. Reason is the correct explanation of Assertion
Assertion and reason are false
Assertion is false, but reason is true
Assertion is true, but reason is false
Formation of rainbow is due to..........
refraction of light
scattering of light
dispersion of light
atmospherics refraction
When a white light falls on a triangular prism, the colour of light which will deviate the least is
violet
green
blue
red
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
Dispersion of light
Scattering of light
Total internal reflection of light
Reflection of light from the earth
View Answer
When white light passes through a prism,
red bends more, violet bends least
red bends least, violet bends most
dispersion doesn't occur
refraction doesn't occur
A ray of white light enters the raindrop and undergoes __________ and __________ to form a rainbow.
dispersion and internal reflection.
reflection; dispersion
dispersion; diffraction
scattering; dispersion
Red light has
longer wavelength
shorter wavelength
longer frequency
none of the above
When white light enters a prism, it gets split into its constituent colours. This is due to
different refractive index for different wavelength of each colour
each colours has same velocity in the prism.
prism material have high density.
Scattering of light
The air layer of atmosphere whose temperature is less then the hot layer behave as optically
denser medium
rarer medium
inactive medium
either denser or rarer medium
The deflection of light by minute particles and molecules of the atmosphere in all direction is called ____________ of light.
scattering
interference
tyndell effect
Reflection
At noon the sun appears white as
light is least scattered
all the colours of the white light are scattered away
blue colour is scattered the most
red colour is scattered the most
Scattering of light by colloidal solution is known as
Scattering
Dispersion
Tyndall effect
Stability
Color which is having maximum angle of deviation is
Red
Violet
Green
Yellow
PHENOMENON RESPONSIBLE FOR FORMATION OF RAINBOW
REFRACTION
DISPERSION
TOTAL INTERNAL REFLECTION
ALL THE ABOVE
SKY APPEARS —————- TO AN ASTRONAUT WHEN HE IS ON EARTH
BLUE
BLACK
DARK
VIOLET
IN CASE OF PRISM ANGLE OF DEVIATION DEPENDS ON
WAVELENGTH
REFRACTIVE INDEX
ANGLE OF INCIDENCE
ALL THE ABOVE
The perpendicular line drawn from the surface of any surface is called as
Normal
Incident Ray
Refracted ray
Emergent ray
Statement: Blue light scatters more than red light during
day time
night time
twilight
none of the above
Refraction of light by the earth’s atmosphere due to variation in air density is called
atmospheric reflection
atmospheric dispersion
atmospheric scattering
atmospheric refraction
Assertion: Refractive index of prism is different for different colors
Reason: The color that has higher speed deviates less and the color that has lesser speed deviates more.
Assertion is true, Reason is true. Reason is a correct explanation for Assertion
Assertion is true, Reason is true. Reason is not a correct explanation for Assertion
Assertion is true, Reason is false
Assertion is false, Reason is true
In prism, angle of emergence is equal to
angle of incidence
angle of refraction
angle of deviation
angle of prism
The angle between two refracting surfaces of prism is called Angle of :
Prism
Emergence
Deviation
Incidence
What would have been the colour of the sky without the atmosphere?
White
Black
Blue
Voilet
which colour has least refractive index?
red
blue
violet
yellow
The separation of visible light into is different colours is known as __________________
displays
dispersion
reflection
refraction
The separation of colours by a glass prism produces a
selection
arrangement
colour belt
spectrum
When light touches the surface of a prism refraction takes place, in simple terms the light
bends
gets longer
straightens
curls up
Look at the diagram given. This is the first prism. What happen if A SECOND inverted prism is placed behind the first prism?
the various colours pass through it and form brighter spectrum
the various colours pass through it and form a white light back
the various colours pass through it and form an opposite spectrum colours
nothing will happen
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?
