Science : Ch 11 – The Human Eye and the Colourful World

This test is designed based on NCERT Syllabus for Class 10 Topics : The Human Eye and the Colourful World

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

At noon, the Sun looks 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

2 / 15

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

Red light moves the fastest.

Blue light moves faster than green light

All the colours of the white light travel with the same speed. (d)

Yellow light moves with the mean speed as that of red and the violet light.

3 / 15

The bluish colour of water in deep sea is due to:

the presence of algae and other plants found in water

refection of the sky in water

scattering of light

absorption of light by the sea

4 / 15

The red colour of the sun at the time of sunrise and sunset is because:

red colour is least scattered

blue colour is least scattered

red colour is most scattered

blue colour is most scattered

5 / 15

The sun appears red at sunset or sunrise. Choose the incorrect statement from the following

Light from the sun near the horizon passes through the layers of air.

Light from the sun near the horizon travels larger distance in the earth’s atmosphere before reaching our eyes. (c)

Most of the blue light and longer wavelengths are scattered away by the particles.

Most of the blue light and shorter wavelengths are scattered away by the

6 / 15

Power of a lens is the measure of the degree of

divergence of light ray

convergence of light ray

convergence or divergence of light ray.

none

7 / 15

When sunlight passes through a canopy of a dense forest, tiny water droplets in the water scatter light.This is an example of

Tyndall effect

Dispersion of light

Scattering of light

Rrefraction of light

8 / 15

Why is red used as the stopping light at traffic signals?

Because of shorter wavelength

Because of longer wavelength

Because of no wavelength

none

9 / 15

The sky appears black to an astronaut

Because there is no refraction

Because there is no reflection

Because there is no scattering light

none

10 / 15

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

Atmospheric refraction

Refraction of light

Atmospheric Reflection

None

11 / 15

Myopia can be corrected by using

convex lens

concave lenses

both concave and convex

none

12 / 15

Rainbow is caused due to

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

13 / 15

A concave lens of short focal length has greater

Converging power than concave lens of long focal length

diverging power than convex lens of long focal length

diverging power than concave lens of long focal length

converging power than convex lens of long focal length

14 / 15

The colour of scattered light depends on the

size of the scattering particle

frequency of the scattering particle

distanceof the scattering particle

15 / 15

The refractive index of glass is least for

violet color

red color

blue color

white color

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Science : Ch 11 – The Human Eye and the Colourful World

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