Human Eye and the Colourful World MCQ Multiple Choice Questions

Q: 1. A spectrum of light is observed when white light is directed to a prism as

Correct Answer is: the different colours in the white light bend away from the normal at same speed to each other on entering the prism.

Q: 2. A student is observing the diagram showing the path of a ray of light passing through a glass prism. He would find that for all angles of incidence the ray of light bends:

Correct Answer is: away from the normal while entering as well as while emerging out of the prism.

Q: 3. A student traces the path of a ray through a glass prism for four different values of angle of incidence. On analysing the diagrams he is likely to conclude that the emergent ray

Correct Answer is: always bends at an angle to the direction of incident ray.

Q: 4. Apparent position of the star appears raised due to

Correct Answer is: none of these

Q: 5. At the time of sunrise and sunset

Correct Answer is: Green and blue scattered and orange reaches our eye

Q: 7. Atomspheric refraction occurs because

Correct Answer is: sun rays travel the most when sun is near the horizon

Q: 8. Blue colour of the sky is due to the phenomenon of:

Correct Answer is: Scattering of light

Q: 9. Clouds appears white due to

Correct Answer is: all of these

Q: 10. Due to atmospheric refraction, apparent length of the day

Correct Answer is: remains the same

Q: 11. Fibre optics work on the principle of

Correct Answer is: Optical rotation

Master the intricacies of the human eye and the colorful world with our Multiple Choice Questions (MCQs). These practice questions are perfect for students and exam aspirants looking to enhance their understanding and prepare effectively.

About Human Eye and the Colourful World MCQ Questions

The Human Eye and the Colourful World MCQs cover essential topics such as the structure and function of the human eye, the phenomenon of light, and the science behind colors. Key concepts include refraction, dispersion, and the working of the eye, along with common vision defects and their corrections.

Why Practice Human Eye and the Colourful World Objective Questions?

Practicing these MCQs offers numerous benefits. They help students solidify their understanding of complex concepts, prepare for school and college exams, and enhance their performance in competitive exams and interviews. Regular practice also aids in quick revision and reinforces learning.

Who Should Use These MCQs?

Human Eye and the Colourful World MCQ Questions for Practice

1. A spectrum of light is observed when white light is directed to a prism as

the different colours in the white light bend away from the normal line at different angles onentering prism.
the different colours in the white light bend towards the normal line at different angles on entering prism.
the different colours in the white light bend away from the normal at same speed to each other on entering the prism.
the different colours in the white light bend towards the normal at same speed to each other on entering prism.

2. A student is observing the diagram showing the path of a ray of light passing through a glass prism. He would find that for all angles of incidence the ray of light bends:

towards the normal while entering into the prism and away from the normal while emerging out of the prism
away from the normal while entering into the prism and towards the normal while emerging out of the prism.
away from the normal while entering as well as while emerging out of the prism.
towards the normal while entering as well as while emerging out of the prism.

3. A student traces the path of a ray through a glass prism for four different values of angle of incidence. On analysing the diagrams he is likely to conclude that the emergent ray

is always parallel to the incident ray.
is always perpendicular to the incident ray.
is always parallel to the refracted ray.
always bends at an angle to the direction of incident ray.

4. Apparent position of the star appears raised due to

atmospheric refraction
scattering of light
both a and b
none of these

5. At the time of sunrise and sunset

Blue colour scattered and red colour reaches our eye
Red colour scattered and blue colour reaches our eye
Green and blue scattered and orange reaches our eye
None of these

6. At the time of sunrise and sunset, the light from sun has to travel

longest distance of atmosphere
shortest distance of atmosphere
both a and b
cant say

7. Atomspheric refraction occurs because

refractive index in medium is gradually changing
of presence of dust particles in atmosphere
large amount of moisture is present in atmosphere on a humid day
sun rays travel the most when sun is near the horizon

8. Blue colour of the sky is due to the phenomenon of:

Reflection of light
Refraction of light
Dispersion of light
Scattering of light

9. Clouds appears white due to

Water droplets scatters all wavelength
Water in frozen conditions looks icy white
Fog is formed around clouds
all of these

10. Due to atmospheric refraction, apparent length of the day

increases
decreases
remains the same
all of these

11. Fibre optics work on the principle of

Scattering of light
Total internal reflection
Total internal absorption
Optical rotation

12. For which of the following cases will the total internal reflection of light be possible?

Angle of incidence is less than the critical angle.
Angle of incidence is equal to the critical angle.
Angle of incidence is greater than the critical angle.
Angle of incidence is equal to the angle of refraction.

13. If the angle of incidence of light while leaving the denser object is zero, the light would

be reflected back
go straight without any refraction
be refracted
end up at the boundary of the object

14. In absence of atmosphere, the colour of sky appears

blue
black
red
yellow

15. Mirage is an example of

reflection of light and refraction of light
dispersion of light
total internal reflection
refraction of light and total internal reflection

16. Mirage is formed because:

air above the ground is very hot and air above is cooler
both a and d are correct
light rays from a distant object bend towards the normal when coming towards the ground.
light rays from a distant object bend away from the normal when coming towards the ground.

17. Mirages are common in

rainforests
dry forests
deserts
highlands

18. Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.

Isaac Newton
Einstein
Kepler
Hans Christian Oersted

19. One cannot see through the fog, because

refractive index of the fog is very high
light suffers total reflection at droplets
fog absorbs light
light is scattered by the droplets

20. Rainbows are created by sunlight

water particles
wind
dust particles
snow

21. Reason behind advance sunrise and delayed sunset

atmospheric refraction
total internal reflection
dispersion
reflection

22. Refraction of light by the earth's atmosphere due to variation in air density is called

atmospheric reflection
atmospheric dispersion
atmospheric scattering
atmospheric refraction

23. Select the colours in the correct ascending of wavelength:

blue, green, red
orange, green. Red
blue, yellow, green
orange, yellow, green

24. Sunlight passes through a canopy of a dense forest is due to

Raman effect
Newton's ring
Spectral effect
Tyndall effect

25. The air layer of atmosphere whose temperature is less than the hot layer behave as optically

denser medium
rarer medium
inactive medium
either denser or rarer medium

26. The blue colour of the sky is because

red colour is scattered more as compared to other colours.
red colour is absorbed more as compared to other colours
blue colour is scattered more as ccompared to other colours
blue colour is absorbed more as compared to other colours

27. The bluish colour of water in deep sea is due to

the presence of algae and other plants found in water
reflection of sky in water
scattering of light
absorption of light by the sea

28. 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.

29. The colour of a star is an indication of its

weight
distance
temperature
size

30. The colour of sky appears blue, it is due to the

refraction of light through the atmosphere
dispersion of light by air molecules
scattering of light by air molecules
all of these