Class 10 Science Chapter 11 MCQ

Class 10 Science Chapter 11 MCQ (Multiple Choice Questions) of Human Eye and Colourful World. Practice with these important questions to be confident in topics given in chapter 11 of grade 10 science.

All the questions are useful for the preparation of class test or terminal exams. Questions are taken from NCERT Book intext pages and exercises question answers.




Class 10 Science Chapter 11 MCQ with Answers for 2020-2021

Class: 10Science
Chapter: 11Human Eye and Colourful World
Contents:MCQ Online Tests with Explanation and Answers

Class 10 Science Chapter 11 MCQ Online Test for 2020-21

Class 10 Science Chapter 11 MCQ Online tests with solutions and explanation are given below. All the questions are important for exams. After completing Chapter 11 from NCERT Textbook, these questions are helpful for the preparation of exams in less time.

Q1

Ruby is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Ruby wants to take help from you:

[A]. The retina is a delicate membrane having a large number of light sensitive cells called “rods” and “cones”.
[B]. Blind spot is a small area of the retina insensitive to light where the optic nerve leaves the eye.
[C]. The space between cornea and eye lens is filled with a watery liquid called “vitreous humor”.
[D]. The retina is behind the eye-lens and at the back part of the eye.
Q2

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




Q3

Which of the following is not caused by the atmospheric refraction of light?

[A]. Twinkling of stars at night
[B]. Sun appearing higher in the sky than it actually is
[C]. Sun becoming visible two minutes before actual sunrise
[D]. Sun appearing red at sunset
Q4

Read the following sentences carefully, and choose the incorrect one:

[A]. The rays of light coming from a distant object are parallel to one another when the reach the eye.
[B]. The rays of light coming from a nearby object are diverging when they reach the eye.
[C]. An eye can focus the image of the distant objects as well as the nearby objects on its retina by changing the focal length of its lens.
[D]. When the eye is looking at a distant object, the eye is said to be accommodate.




Q5

Which of the following statement is correct regarding the propagation of light of different colours of 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 lights moves with the mean speed as that of the red and the violet light.
Q6

The danger signals installed at the top of tall buildings are red in colour. This can be easily seen from the distance because among all the 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




Q7

A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. 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.
Q8

The focal length of the eye lens increases when eye muscles

[A]. Are relaxed and lens become thinner [B] [C] [D]
[B]. Contract and lens becomes thicker
[C]. Are relaxed and lens becomes thicker
[D]. Contract and lens becomes thinner



Q9

The human eye possesses the power of accommodation. This is the power to:

[A]. Alter the diameter of the pupil as the intensity of light changes
[B]. Distinguish between lights of different colours
[C]. Focus on objects at different distances
[D]. Decide which of the two objects is closer.
Q10

How does the eye change in order to focus on near or distant objects?

[A]. The lens moves in or out
[B]. The retina moves in or out
[C]. The lens becomes thicker or thinner
[D]. The pupil gets larger or smaller
What is the function of Iris?

Iris is a dark muscular diaphragm that controls the size of the pupil.

What is meant by accommodation of eye?

The ability of the eye lens to adjust its focal length is called accommodation.

Why do stars twinkle?

The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth.This makes continuously change in star’s position and we see the twinkling of stars.

Why does sky apear blue in colour?

The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. These are more effective in scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end. When sunlight passes through the atmosphere, the fine particles in air scatter the blue colour (shorter wavelengths) more strongly than red. The scattered blue light enters our eyes and we see blue sky.



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