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

A clear sky appears blue, because:

blue light gets absorbed in the atmosphere

ultraviolet radiations are absorbed in the atmosphere

violet and blue lights get scattered more than the lights of all other colours by the atmosphere

lights of all other colours is scattered more than the violet and blue colour lights by the atmosphere

3 / 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.

4 / 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

5 / 15

The absorption of light by a molecule depends on the

wavelength and the size of the molecule

wavelength

size of molecules

none

6 / 15

A student traces the path of a ray of light through a triangular glass prism for diferent values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

The emergent ray is parallel to the incident ray

The emergent ray bends at an angle to the direction of the incident ray

The emergent ray and the refracted ray are at right angles to each other.

The emergent ray is perpendicula

7 / 15

The effect seen Color of the sky during Sunrise and Sunset

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

8 / 15

Lenses which have both concave and convex structure.

Bifocal lenses

Concave lenses

Difocal lenses

Convex lenses

9 / 15

Myopia can be corrected by using

convex lens

concave lenses

both concave and convex

none

10 / 15

Astigmatism can be corrected

convex lens

concave lenses

cyclindrical lens

bifocal lens

11 / 15

Rainbow is caused due to

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

12 / 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

13 / 15

The SI unit of Power of a lens is

Hertz

Dipotre

newton

none

14 / 15

The emergent ray in a prism bend at an angle to the direction of the

incident ray

refracting ray

reflecting ray

none

15 / 15

The refractive index of glass is largest 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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