1.
Which ray is least deviated by a prism?
A
Violet ray
B
Green ray
C
Red ray
D
Yellow ray
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64 practice sets · Page 1 of 4
Which ray is least deviated by a prism?
Violet ray
Green ray
Red ray
Yellow ray
Which of the following will not show Tyndall effect?
Milk
Sugar solution
Smoke
Emulsion
Which of the following statements is correct regarding the propagation of light of different colours of white light in air?
Red light moves fastest.
Blue light moves faster than green light.
All the colours of the white light move with the same speed.
Yellow light moves with the mean speed as that of the red and the violet light.
Which of the following phenomena of light are involved in the formation of a rainbow?
Reflection, refraction and dispersion
Refraction, dispersion and total internal reflection
Refraction, dispersion and internal reflection
Dispersion, scattering and total internal reflection.
Which of the following is not due to total internal reflection?
Sparkling of diamond
Mirage
Looming
Twinkling of stars
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
Twinkling of stars
Stars seem higher than they actually are
Advanced sunrise and delayed sunset
Rainbow
Which of the following are the primary colours of light?
Red, Blue, Yellow
Red, Green, Violet
Yellow, Green, Blue
Red, Green, Blue
Which light is easily scattered?
Long wavelength light
Short wavelength light
Sunlight
Coherent light
Which among the following acts as rarer medium?
Hot air
cold Air
Both are same medium
none
When white light passes through a glass prism
red coloured ray undergoes maximum deviation
green coloured ray undergoes minimum deviation
blue coloured ray undergoes minimum deviation
violet coloured ray undergoes maximum deviation
When white light is incident on a green leaf
only green colour is absorbed
only green colour is reflected
all other colours are reflected
the leaf appears black
When white light enters a glass prism from air, the angle of deviation is least for
blue light
yellow light
violet light
red light
When white light enter a prism, it gets spilt into its constituent colours. This is due to
different refractive index for different wavelength of each colour
each colour has same velocity of the prism
prism material have high density
scattering of light
When the starlight enters the earth's atmosphere
it bends away from the normal
it bends towards the normal
it first bends towards the normal and then away from the normal
it first bends away from the normal and then towards the normal.
When a ray of light travels from an optically denser medium to an optically rarer medium
it moves towards the normal
it moves away from the normal
it is not refracted
it is reflected back in the denser medium
What will be the colour of sky if there is no atmosphere on the earth?
Dark blue
Black
white
Red
What is the time difference between actual sunset and apparent sunset?
2 sec
20 sec
2 min
20 min
What is the colour of the sky when it is seen from moon's surface?
Red
blue
white
Black
Tyndall effect is due to
scattering of light
dispersion of light
reflection of light
refraction of light
Twinkling of stars is due to atmospheric
dispersion of light by water droplets
refraction of light by different layers of varying refractive indices
scattering of light by dust particles
internal reflection of light by clouds