If you are looking for MCQ Questions for Class 10 Science Chapter 11, then you are in the right place. These MCQ questions are based on NCERT Solutions for class 10 science Chapter 11. So you should go through chapter 11 - The Human Eye and The Colourful World.
MCQ Questions for Class 10 Science Chapter
11 have been prepared on the basis of the CBSE syllabus for Class 10 Science for
Academic session 2021-22.
MCQ Questions for Class 10 Science Chapter 11
MCQ Questions for Class 10 Science Chapter 11 have been prepared according to the new pattern of 10 Board Examinations 2021-22 and completely based on the NCERT Science book of class 10.
Correct answers with Explanation are also
given so that you can better understand the basic concept of questions.Ch 11 science class 10 NCERT solutions will help you to solve these MCQ questions more effectively.
For detailed and thorough study you can
also, check NCERT Solution of Class 10 Science.
The students can download MCQ Questions
for Class 10 Science Chapter 11 in PDF format from the link given below.
MCQ Questions for Class 10 Science Chapter
11 lets you understand the structure of the human eye, accommodation power, eye
defects and their corrections. In this chapter, you will also learn about
atmospheric refraction and another phenomenon like- blue colour of the sky,
formation of the rainbow, reddish colour of the sky at the time of sunrise and sunset, the twinkling of stars, Tyndall effect.
To better understand the topics you must
go through NCERT solutions of class 10 chapter 11.
Chapter 11 The Human Eye and the Colourful World
Multiple Choice Questions
Choose
the correct answer
1.
Light
enters the eyes through
(a) pupil
(b) Iris
(c) Cornea
(d) Retina
Correct answer- (c)
Explanation – Cornea is the
transparent part of eye so light enters through it.
2.
In human
eye, image is formed at
(a)pupil
(b)iris
(c)cornea
(d)retina
Correct answer- (d)
Explanation –After refection by the
eye lens. Light rays get focused on retina. So image is formed at retina.
3.
Amount of
entering light is adjusted by
(a) pupil
(b)iris
(c)cornea
(d)retina
Correct answer- (a)
Explanation – Pupil is a small hole
in Iris of eye, light enters through pupil. It expands and contracts according
to the intensity of light.
4.
The size of
pupil is controlled by
(a) iris
(b)ciliary muscles
(c) cornea
(d)all the above
Correct answer- (a)
Explanation – Pupil is small hole in
iris and its expansion and contraction is controlled by iris.
5.
Focal
length of the eye lens is changed by
(a) iris
(b)ciliary muscles
(c) cornea
(d)all the above
Correct answer- (b)
Explanation – Eye lens is attached
with ciliary muscles. These ciliary muscles contract and expand, due to which
focal length of the lens is changed.
6.
The
diameter of eye ball is
(a)1.3 cm
(b)2.5 cm
(c) 3.3 cm
(d)2.3 cm
Correct answer- (d)
7.
When
ciliary muscles are relaxed the focal length of eye lens is
(a) 1.3 cm
(b)2.5 cm
(c) 3.3 cm
(d)2.3 cm
Correct answer- (b)
Explanation – 25 cm is the near point
of a healthy eye at which objects can be seen clearly without any stress.
8.
A person
can see an object when its image is formed
(a) in front of the retina
(b)away from the retina
(c) in front of cornea
(d) at the retina
Correct answer- (d)
9.
The least
distance of distinct vision is
(a) 25cm
(b)35 cm
(c) 30 cm
(d)infinity
Correct answer- (a)
Explanation – 25 cm is the least
distance of distinct vision and it is also known as near point of eye.
10. The far
point of the normal vision is
(a)25cm
(b)35 cm
(c)30 cm
(d)infinity
Correct answer- (d)
Explanation – A healthy eye can see
far objects like stars that are at infinity distance.
11. A convex
lens is used to rectify
(a) myopia
(b)presbyopia
(c) hypermetropia
(d)astigmatism
Correct answer- (c)
Explanation – A person with hypermetropia
cannot see nearby objects clearly so a convex lens is used to rectify this eye
defect.
12. When focal
length of eye lens increases permanently, it results in
(a) myopia
(b)presbyopia
(c) hypermetropia
(d) astigmatism
Correct answer- (c)
Explanation - Focal length of eye
lens increases, near point of eye, goes far away so a person can’t see nearby
objects and it result in hypermetropia.
13. In the
beginning of a cataract a person
(a) cannot see in dim-light
(b)sees all the objects of white colour
(c) cannot distinguish in certain colours
(d)can see using a lens of power
Correct answer- (a)
14. Ageing
results in
(a) myopia
(b)presbyopia
(c) hypermetropia
(d)astigmatism
Correct answer- (b)
Explanation – Power of accommodation
of eye, lens decreases with ageing and cause presbyopia.
15.A person cannot simultaneously focus on both
horizontal and vertical lines, he is suffering from
(a) myopia
(b)presbyopia
(c) hypermetropia
(d)astigmatism
Correct answer- (d)
16. Elongation
of eyeball results
(a) myopia
(b)presbyopia
(c) hypermetropia
(d)all the above
Correct answer- (a)
17. The lens
used to rectify myopia is
(a) convex
(b)concave
(c) cylindrical
(d)bifocal
Correct answer- (b)
Explanation -
18. The lens
used to rectify astigmatism is
(a) convex
(b)concave
(c) cylindrical
(d)bifocal
Correct answer- (c)
Explanation – Concave lens is used to
see far objects clearly.
19.The lens
used to rectify hypermetropia is
(a) convex
(b)concave
(c) cylindrical
(d)bifocal
Correct answer- (a)
20. An old person cannot see nearby and distant objects, he should use
(a) convex
(b)concave
(c) cylindrical
(d)bifocal
Correct answer- (d)
Explanation – In bifocal length both
concave and convex lenses are used.
21. Cataract
can be corrected by using
(a) convex lens
(b)concave lens
(c) bifocal lens
(d)it cannot be corrected by the use of a lens
Correct answer- (d)
22. The person
cannot donate eyes, who is suffering from
(a) asthma
(b)hypertension
(c) diabetes
(d)leukaemia
Correct answer- (d)
23. Rainbow is
caused due to .............. of light.
(a) reflection
(b)refraction
(c) dispersion
(d)all the above
Correct answer- (d)
Explanation – At the time of rain,
sunlight passes through water droplets and get refracted, reflected and
dispersed, due to this rainbow is formed in the sky.
24. Very fine
particles scatter mainly
(a) red light
(b)blue light
(c) green light
(d)all the light
Correct answer- (b)
25. The time
difference between actual sunset and the apparent sunset is about
(a)4 minutes
(b)6 minutes
(c) 2 minutes
(d)15 minutes
Correct answer- (c)
26.A student
sitting on the last bench can read the letters, written on the blackboard but cannot
read the book. The correct statement about him is
(a) the far point of his
eyes has come closer to him
(b) the far point of his eyes has receded away
(c) the near point of his
eyes has come closer to him
(d) the near point of his eyes has receded away
Correct answer- (d)
Explanation – when a person can’t see
nearby objects clearly. It means the near point of his eye has gone far away.
27. Regarding
the propagation of light, the correct statement is
(a) red light mover fastest
(b)blue light moves fastest
(c) lights of all colours
move at the same speed
(d) red light moves
faster than orange light
Correct answer- (c)
28. The clear
sky appears blue, because
(a) in the noon, infra-red
rays are absorbed
(b)blue and violet
colour lights are scattered more than all other colours by the atmosphere
(c) blue light gets
absorbed in the atmosphere
(d) light of other
colours, except violet and blue are scattered more
Correct answer- (b)
Explanation – blue and violet colours
of the sunlight are scattered by small particles of the upper layer of the
atmosphere.
29. At noon the
sun appears white, because
(a) all the colours of
white light are scattered away
(b) blue and red colour
lights are absorbed
(c) in the noon, infrared rays are absorbed
(d) blue and red colour
lights are scattered move
Correct answer- (a)
30. Twinkling
of stars takes place due to atmospheric
(a) internal reflection
of light by clouds
(b) refraction of their
light by layers of different refractive indices
(c) scattering of light
by dust particles
(d) dispersion of light
by water droplets
Correct answer- (b)
31. Signals or
danger signals are mostly red because red light is scattered
(a) the least by smoke or fog
(b)the most by smoke or
fog
(c) not at all
(d)attractively
Correct answer- (a)
Explanation – Red light is of a long
wavelength.
32. Clouds
generally appear white due to
(a) absorption of all colours of light
(b)scattering of all colours of light
(c) reflection of light
(d)refraction of light
Correct answer- (b)
33. Deepwater
appears blue due to
(a) algae and other
aquatic plants present
(b)image of blue sky
(c) scattering of light
(d)absorption of
light by deep water
Correct answer- (c)
34. Light
entering the eye gets the most refraction at the
(a) iris
(b) outer surface of the cornea
(c) crystalline lens
(d)pupil
Correct answer- (b)
35. At sunrise or sunset, the sun and the surrounding sky appears red due to
(a) total internal
reflection of light
(b) refraction of light through the atmosphere
(c) at sun rise or sun
set, the red light of longer wavelength can reach our eyes
(d) dispersion of light
Correct answer- (c)
36. A person
cannot see a distinct objects kept beyond 2 m. the defect can be corrected by
using a lens of power-
(a)+0.5D
(b)-0.5D
(c)+0.2D
(d)-0.2D
Correct answer- (b)
37. The focal
length of eye lens increases when eye muscles–
(a)contract and lens becomes thicker
(b) are relaxed and lens becomes thinner
(c) are relaxed and lens becomes thicker
(d) contract and lens becomes thinner
Correct answer- (b)
38. Which of the following is correct?
(a)A person with hypermetropia cannot see distant objects clearly
(b) A person with myopia can see nearby objects clearly
(c)A person with hypermetropia can see nearby objects clearly
(d)A person with myopia can see distant objects clearly
Correct answer-
(b)
Explanation – A
person with myopia can see nearby objects clearly but can’t see distant objects
clearly, as his far point becomes nearer than infinity. It is also called near-sightedness.
39. In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray-
(a)Is parallel to the incident ray
(b) perpendicular to the incident ray
(c)is parallel to the refracted ray
(d)bands at an angle to the direction of the incident ray
Correct answer –(d)
40. The property related to
the sense of continuity of vision is called
(a)Colour
blindness
(b)Optical
illusion
(c)
Persistence of vision
(d)
None of these
Correct answer –(c)
41. The focal
length of the eye lens increases when eye muscles
(a) contract and lens
becomes thicker
(b) are relaxed and lens becomes thinner
(c) are relaxed and lens becomes thicker
(d) contract and lens becomes thinner
Correct answer –(b)
42. The message of image, formation is conveyed to the brain by
(a)Cornea
(b) Yellow spot
(c)Optical nerves
(d) Ciliary muscles
Correct answer – (c)
43. Colour blindness is due to the absence of
(a)Rod shapped cells
(b) Cone –shaped cells
(c)Both (a) and (b)
(d)None of these
Correct answer- (b)
Class 10 science chapter 11 fill in the blanks
Following fill in the blanks will be very
useful and important for you in the context of new pattern of CBSE Class Board
Exams 2021-22. You can prepare Multiple Choice Questions using following fill
in the blanks yourself.
The Human Eye and the Colourful World fill in the blanks
Fill in the blanks
1. Eye donor can belong to any age group
or ........
2.Light enters the eye through ........
3.Far point of a normal human eye is
........
4.In human-eye, image is formed at
........
5.The ........ shaped cells present in retina respond to the intensity of light.
6.When the light is very bright, the pupil
becomes ........
7.At an age of 60 years, the near point is
about ........ cm.
8. A
short-sighted person, cannot see the ........ objects clearly.
9.A convex lens is used to rectify
........ sightedness.
10.The least distance of distinct vision
is ........ cm.
11.The retina of chick has mostly ........
12.A ........ person cannot see distant
objects.
13.A cylindrical lens is used to correct
........
14.Iris controls the size of ........
15......... helps in regulating the amount
of the light entering the eye.
16.When the muscles are relaxed, the
focal length of eye-lens is about
........ cm
17.The ability of eye-lens to adjusts its
focal length is called ........
18.The splitting of white light into its
component colours is called ........
19......... of light causes sky blue.
20.The red light bends ........
21.The twinkling of stars is based on
........ refraction.
22.The ........ of scattered light depends
on the size of scattering particles.
23.Low converging power of eye lens
results in ........
24......... develops due to aging.
25.In ........, a person cannot focus on
horizontal and vertical lines simultaneously.
26.A thin membrane develops over the eye
lens in ........
27.A concave lens is used to rectify
........
28.Excessive curvature of cornea, results
in ........
29.When eyeball becomes shorter than
normal one, person suffers from ........
30.When the ciliary muscles are relaxed,
the focal length of eye-lens is about ........ cm.
Must remember the following points-
ü Outer
bulging part of the eye is called cornea which allow light to enter in eye.
ü Iris
controls the amount of light entering the eye by adjusting the size of pupil.
ü Retina
acts as a screen on which image is formed.
ü Optic
nerve carries a message of the image from retina to the brain.
ü Violet
colour deviates most and red colour deviates least.
ü Scattering
of light is bouncing back of light in a different direction when if fall on tiny particles.
I hope this article will be very helpful
to you. I am working regularly to provide you with the best educational content.
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