Human Eye and Colourful World

In this quiz, you are going to solve questions related to Human Eye, Parts of Human Eye, Power of Lens, Twinkling of Stars, Why Signals are made up of Red Colour, why Sky appears Blue.

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Rahul was asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

Rods are the rod-shaped cells present in the retina of an eye which are sensitive to dim light. Cone are the cone shaped cells present in the retina of an eye which are sensitive to bright light or normal light. The cones easily work on in dim light but not bright light. Normal eye can see the distant objects as well as the nearby objects clearly due to its power of accommodation.

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

Read the following sentences carefully, and choose the incorrect one about human eye:

The human eye works on the refraction of light The eye lens is a convex lens made of a transparent, soft and flexible material like a jelly made of proteins. The focal length of a lens can be changed by changing its shape by the action of ciliary muscles. All the above

Sunset is red because at that time the light coming from the sun has to travel:

Lesser thickness of earth’s atmosphere Greater thickness of earth’s atmosphere Varying thickness of earth’s atmosphere Along the horizon

Student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters are written in his textbook. Which of the following statements is correct?

The near point of his eyes has receded away. The near point of his eyes has come closer to him The far point of his eyes has come closer to him The far point of his eyes has receded away

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

Dispersion of light Scattering of light Total internal reflection of light Reflection of light from the earth

A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power

+ 0.5 D – 0.5 D + 0.2 D – 0.2 D

What type of image is formed by the eye lens on the retina?

Real and erect Virtual and inverted Real and inverted Virtual and erect

The amount of light entering the eye can be controlled by the

Iris

Pupil

Cornea

Ciliary muscles

The splitting of white light into different colours on passing through a prism is called

Reflection

Refraction

Dispersion

Deviation

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

At noon the sun appears white as

Light is least scattered.

All the colours of the white light are scattered away.

Blue colour is scattered the most.

Red colour is scattered the most.

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

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

Is scattered the most by smoke or fog.

Is scattered the least by smoke or fog.

Is absorbed the most by smoke or fog.

Moves fastest in air.

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

Quiz/Test Summary

Title: Human Eye and Colourful World

Questions: 15

Contributed by:

Vishal Prajapati Thu, Feb 10, 2022 07:12 PM UTC

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