MCQ Chapter 11 Human Eyes and Colourful World Class 10 Science

Please refer to Human Eyes and Colourful World MCQ Questions Class 10 Science below. These MCQ questions for Class 10 Science with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Human Eyes and Colourful World will help you to prepare for the exams and get more marks.

Human Eyes and Colourful World MCQ Questions Class 10 Science

Please see solved MCQ Questions for Human Eyes and Colourful World in Class 10 Science. All questions and answers have been prepared by expert faculty of standard 10 based on the latest examination guidelines.

MCQ Questions Class 10 Science Human Eyes and Colourful World

Question: The human eye forms the image of an object at its     
(a) Cornea
(b) Iris
(c) Pupil
(d) Retina

Question: The cells which enable us to distinguish different colours are
(a) Rod shaped 
(b) Cone shaped
(c) Both rod and cone shaped
(d) None of these.

Question: The least distance of distinct vision for a young adult with normal vision is about 
(a) 25m
(b) 2.5cm
(c) 25cm
(d) 2.5m.

Question: A human eye can focus objects at different distances by adjusting the focal length of the eye lens.
This is due to
(a) Persistence of vision   
(b) Near sightedness
(c) Accommodation
(d) Far sightedness

Question: The change in focal length of an eye is caused by the action of
(a) Pupil
(b) Retina     
(c) Ciliary muscles
(d) Iris.

Question: A glass prism has
(a) 6 rectangular surfaces     
(b) 4 rectangular surfaces
(c) 2 triangular bases and 3 rectangular surfaces
(d) None of the above.

Question: The nature of the eye lens is
(a) Always convex
(b) Always concave   
(c) Sometimes convex and other times concave
(d) Cannot say.

Question: How much refraction occurs in the ray passing through a prism?
(a) 1
(b) 4
(c) 3
(d) 2   

Question: Angle of deviation is given by   
(a) d = i +e – A
(b) d = i – e + A
(c) d = A – i + e
(d) None of these.

Question: A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
(a) + 0.5 D
(b) – 0.5
(c) + 0.2 D
(d) – 0.2   

Question: Which of the following phenomena of light are involved in the formation of a rainbow?
(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection 
(d) Dispersion, scattering and total internal reflection

Question: Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
(a) Dispersion of light
(b) Scattering of light
(c) Total internal reflection of light
(d) Reflection of light from the earth

Question: Twinkling of stars is due to atmospheric
(a) Dispersion of light by water droplets     
(b) Refraction of light by different layers of varying refractive indices
(c) Scattering of light by dust particles
(d) Internal reflection of light by clouds

Question: At noon the sun appears white as
(a) Light is least scattered
(b) All the colours of the white light are scattered away   
(c) Blue colour is scattered the most
(d) Red colour is scattered the most

Question. A got his eye tested. The optician’s prescription for the spectacles was:   
Left eye: −3 D
Right eye: −3.50 D
The person is having a defect of vision called:
(a) Presbyopia
(b) Myopia
(c) Astigmatism
(d) Hypermetropia

Question. How eyes adjust in order to focus the image of near or distant objects on retina?     
(a) The lens moves in or out according to the position of the object
(b) The retina moves in or out according to the position of the object
(c) The lens becomes thicker or thinner according to the position of the object
(d) The pupil gets larger or smaller according to the position of the object

Question. With both eyes open, a person’s field of view is about:     
(a) 90^o
(b) 150^o
(c) 180^o
(d) 360^o

Question. Having two eyes facilitates in:     
A: Increasing the field of view
B: Bringing three dimensional view
C: Developing the concept of distance/size.
Then the correct option is/are:
(a) A only
(b) A and B only
(c) B only
(d) A, B and C

Question. When a beam of white light falls on a glass prism, the colour of light which will deviate least is:     
(a) Violet
(b) Red
(c) Green
(d) Blue

Question. The star appear shifted from their actual position due to the phenomenon of:   
(a) Diffraction of light
(b) Scattering of light
(c) Refraction of light
(d) Reflection of light

Question. Blue colour of the sky is due to the phenomenon of:   
(a) Reflection of light
(b) Refraction of light
(c) Dispersion of light
(d) Scattering of light

Question. A man finds it difficult to read the odometer on the dashboard of the car but is able to clearly read a distant road sign. Which of the following statement is correct about this man?   
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come closer to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.

Question. Figure a, b, c respectively; indicate the point in case of:   
(a) The Hypermetropia eye, the myopic eye and normal eye
(b) The normal eye, the myopic eye and Hypermetropia eye
(c) The normal eye, the Hypermetropia eye and myopic eye
(d) The myopic eye, the normal eye and Hypermetropia eye

Question. The term “accommodation” as applied to the eye, refers to its ability to:     
(a) Control the light intensity falling on the retina
(b) Erect the inverted image formed on the retina
(c) Adjust the focal length of the lens
(d) Vary the distance between the lens and retina

Question. A: Astigmatism usually is caused by an irregularly shaped cornea.   
B: Rainbow is the natural phenomenon in which dispersion takes place.
(a) Both ‘A’ and ‘B’ are true statements.
(b) Both ‘A’ and ‘B’ are false statements.
(c) ‘A’ is true while ‘B’ is false.
(d) ‘A’ is false while ‘B’ is true.

Question. A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called:   
(a) Cataract
(b) Hypermetropia
(c) Myopia
(d) Presbyopia

Question: The clear sky appears blue because
(a) Blue light gets absorbed in the atmosphere   
(b) Ultraviolet radiations are absorbed in the atmosphere
(c) Violet and blue lights get scattered more than lights of all other colours by the atmosphere
(d) Light of all other colours is scattered more than the violet and blue colour lights by the
atmosphere

Question: 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
(a) is scattered the most by smoke or fog   
(b) is scattered the least by smoke or fog
(c) is absorbed the most by smoke or fog
(d) moves fastest in air

Question: Which of the following statements is correct regarding the propagation of light of different colours of white light in air?
(a) Red light moves fastest
(b) Blue light moves faster than green light 
(c) All the colours of the white light move with the same speed
(d) Yellow light moves with the mean speed as that of the red and the violet light

Question: The focal length of the eye lens increases when eye muscles
(a) Are relaxed and lens becomes thinner
(b) Contract and lens becomes thicker     
(c) Are relaxed and lens becomes thicker
(d) Contract and lens becomes thinner

Question: The phenomena of light responsible for the working of the human eye is
(a) Reflection
(b) Refraction
(c) Power of accommodation     
(d) Persistence of vision

Question: Which of the following phenomena of light are involved in the formation of a rainbow?
(a) Reflection, dispersion and refraction
(b) Refraction, dispersion and total internal reflection     
(c) Refraction, dispersion, and internal reflection
(d) Dispersion, scattering and total internal reflection

Question: On entering a glass prism, sun‘s rays are
(a) Deviated and dispersed
(b) Deviated but not dispersed   
(c) Dispersed but not deviated
(d) Neither deviated nor dispersed

Question: The persistence of vision of human eye is
(a) 1/10th of a second
(b) 1/16th of a second 
(c) 1/6th of a second
(d) 1/18th of a second

Question: Write the relation between angle of the prism, angle of deviation, angle of incidence and angle of emergence        
(a) A+ e = I + D
(b) A + D = I + e
(c) A + i = D + e
(d) A – D = I – e       

ONE WORD ANSWERS

Question: The Retina contains about ___________ number of cones cells that see colour.  

Question: The band of 7 colours formed when white light is passed through the prism is called ___________  

Question: At the point of blind spot there no ___________ and ___________  

Question: The process of spitting of white light into its seven constituent colours is called ___________  

Question: The eye lens can change its focal length by changing its thickness with the help of ___________ 

Question:  Recombination of seven colours of dispersed white light into white light again is also called _______  

Question:___________ Colour has longer wavelength.   

Question: Sometimes you see a person reading the newspaper by placing it far away from his eyes, he is having ___________ defect. 

Question: Sometimes you see a person reading the newspaper by placing it very close to his eyes, he is having ___________ defect. 

Question: The scattering of light depends inversely upon the ___________ power of the wavelength.

Question: The fluid present between the pupil and the retina is called___________  

Question:___________ is a defect of the eye in which a membrane covers the eye lens.  

Question: ___________ Colour has shorter wave length. 

Question: ___________ is the lack of ability to distinguish between colours.  

Question:For a normal human eye, of an adult, the near point is about ___________  

Question: For a normal eye, the far point is ___________  

Question: ___________ is a muscular coloured diaphragm in our eyes.   

NAME THE FOLLOWING

Question: Name the phenomenon 

Question: Identify the diagram; name the defect how can it be corrected? 

Question: Name the defect     

Question: Complete the diagram.   

Question: Mark the parts 

MATCH THE COLUMN A WITH COLUMN B

Question.

COLUMN A	COLUMN B
(a) Cornea	(i) Controls the size of the pupil
(b) Iris	(ii) Light sensitive screen
(c) Retina	(iii) Allows the light
(d) Pupil	(iv) Adjust the focal length
(e) Ciliary muscles	(iv) Adjust the focal length

Question.

COLUMN A	COLUMN B
(a) Concave lens	(i) Astigmatism
(b) Convex lens	(ii) Myopia
(c) Bifocal lens	(iii) Hypermetropia
(d) Cylindrical lens	(iv) Presbyopia
(e) Concave lens	(v) Astigmatism

Question.

COLUMN A	COLUMN B
(a) Twinkling of stars	(i) Longer wavelength
(b) Rainbow	(ii) Scattering of sunlight
(c) Blue colour of the sky	(iii) Dispersion
(d) Danger signals are red	(iv) Atmospheric refraction

Question.

COLUMN A	COLUMN B
(a) Red	(i) Scattered least
(b) Violet	(ii) Deviated least
(c) Blue	(iii) Deviated most

Question.

COLUMN A	COLUMN B
(a) Retina	(i) Crystalline double convex lens
(b) Blind spot	(ii) Cones and rods
(c) Eye lens	(iii) Coloured pigments
(d) Iris	(iv) Flexible
(e) Ciliary muscle	(v) Does not contain cones and rods