# MCQ Questions for Class 8 Science Chapter 16 Light with Answers

We have compiled the NCERT MCQ Questions for Class 8 Science Chapter 16 Light with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 8 Science with Answers on a daily basis and score well in exams. Refer to the Light Class 8 MCQs Questions with Answers here along with a detailed explanation.

## Light Class 8 MCQs Questions with Answers

Choose the correct option.

Question 1.
We are able to see an object due to the presence of
(a) light
(b) dark
(c) refraction
(d) object

Question 2.
The bouncing back of light into the same medium is called
(a) refraction
(b) reflection
(c) dispersion
(d) diffraction

Question 3.
A mirror has _____ surface.
(a) rough
(b) polished
(c) dark
(d) all of these

Question 4.
Maximum part of light is reflected by
(a) opaque object
(b) translucent object
(c) transparent object
(d) all of these

Question 5.
Beam of light striking the reflecting surface is called
(a) incident ray
(b) reflected ray
(c) refracted ray
(d) normal ray

Question 6.
The back side of a plane mirror contains
(a) gold coating
(b) silver coating
(c) aluminium coating
(d) copper coating

Question 7.
The perpendicular drawn to the reflecting surface is called
(a) normal
(b) incident ray
(c) reflected ray
(d) none of these

Question 8.
There are ________ laws of reflection.
(a) one
(b) two
(c) three
(d) four

Question 9.
The angle of incidence is always _______ to the angle of reflection.
(a) greater
(b) smaller
(c) equal
(d) none of these

Question 10.
The angle between the reflected ray and the normal is called
(a) angle of incidence
(b) reflected ray
(c) angle of reflection
(d) point of incidence

Question 11.
The reflection of light from a smooth surface is called
(a) diffused reflection
(b) regular reflection
(c) dispersion
(d) spectrum

Question 12.
Which of the following results in diffused reflection?
(a) Plane mirror
(b) Shiny surface
(c) Silver
(d) Wood

Question 13.
The nature of image formed by plane mirror is
(a) real and inverted
(b) virtual and erect
(c) real and erect
(d) virtual and inverted

Question 14.
If you hold a pen in your right hand and stand in front of the mirror, the pen will be in the left hand in the image. This phenomenon is called
(a) lateral inversion
(b) diffraction
(c) reflection
(d) inversion

Question 15.
If two plane mirrors are inclined at an angle of 40°, number of images formed will be
(a) 7
(b) 8
(c) 9
(d) 5

Question 16.
Type of mirror used as side view mirror is
(a) convex mirror
(b) plane mirror
(c) concave mirror
(d) ground mirror

Question 17.
Band of seven colours is called
(a) VIBGYOR
(b) dispersion
(c) spectrum
(d) reflection

Question 18.
Front bulged part of the eyeball is called
(a) cornea
(b) iris
(c) retina
(d) pupil

Question 19.
Two mirrors A and B are placed at right angles to each other. A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be
(a) 25°
(b) 50°
(c) 65°
(d) 115°

Question 20.
Visually impaired people can read and write using
(a) electronic writer
(b) Braille system
(c) digital pens
(d) hearing aids

Question 21.
A toy is placed at 10 cm in front of a plane mirror. What is the distance of image from the mirror?
(a) 20 cm
(b) 40 cm
(c) 10 cm
(d) 30 cm

Question 22.
A candle is 30 cm high. What is the height of its image in a plane mirror?
(a) 10 cm
(b) 15 cm
(c) 30 cm
(d) 45 cm

Question 23.
Which of the following works on the concept of multiple reflections?
(a) Telescope
(b) Binoculars
(c) Kaleidoscope
(d) Sunglasses

Question 24.
Visually challenged people can read and write with
(a) hearing aid
(b) electronic type writer
(c) Braille system
(d) digital pen

Question 25.
The human eye can clearly see up to which distance?
(a) Infinity
(b) 1000 km
(c) 100 km
(d) 10 km

Question 26.
The human eye cannot see clearly at a distance which is less than
(a) 2.5 cm
(b) 25 cm
(c) 15 cm
(d) 1.5 cm

Question 27.
The angle between the incident ray and the normal is called angle of
(a) reflection
(b) refraction
(c) transmission
(d) incidence

Question 28.
Which of the following parts of an eye controls the amount of light entering the eye by contracting or dilating?
(a) Retina
(b) Cornea
(c) Pupil
(d) Iris

Question 29.
The phenomenon of breaking up of white light into its seven constituent colours is called
(a) reflection of light
(b) refraction of light
(c) dispersion of light

Question 30.
We can see ourselves in a mirror or a polished surface but not on walls because of
(a) regular reflection
(b) normal reflection
(c) irregular reflection
(d) specular reflection

Question 31.
How many cells are there in a Braille character?
(a) 12
(b) 9
(c) 3
(d) 6

Question 32.
Which of the following will produce a regular reflection?
(a) Tree leaf
(b) Wood
(c) Wall
(d) Mirror

Question 33.
An instrument which enables us to see things which are too small to be seen with naked eye is called
(a) microscope
(b) periscope
(c) kaleidoscope
(d) none of these

Question 34.
The property of a plane mirror to make ‘right appear as left’ and vice versa, is called
(a) vertical inversion
(b) lateral inversion
(c) reflection
(d) refraction

Fill in the blanks with suitable word/s.

Question 1.
Light is a form of __________

Question 2.
The ray of light which strikes the reflecting surface is called __________ ray.

Question 3.
The bouncing back of light after it falls on a surface is called __________

Question 4.
A mirror has _________ and _________ surface.

Question 5.
__________ is the perpendicular line on the incidence point.

Question 6.
A plane mirror forms a _________ image.

Question 7.
The ray which returns after striking the surface is called __________ ray.

Question 8.
Angle of incidence is always __________ to the angle of reflection.

Question 9.
Reflection from a smooth surface is called __________ reflection.

Question 10.
The size of image formed by the plane mirror is __________ as size of object.

Question 11.
Splitting of light into seven colours is called __________

Question 12.
Kaleidoscope is based on the concepts of __________

Question 13.
The point on the surface at which incident ray strikes is called __________

Question 14.
The reflection of light from an uneven surface is called __________

Question 15.
Paper is a _________ surface.

Question 16.
Mirror is a __________ surface.

Question 17.
When the mirrors are inclined at 900, we get images.

Question 18.
In bright light, the size of pupil __________

Question 19.
The space between the cornea and lens is filled with a liquid called __________

Question 20.
Braille system was invented by __________

Question 21.
The image formed by a plane mirror is ………………….. inverted.

Question 22.
The angle of incidence is always equal to the angle of …………………..

Question 23.
………………….. formation is the natural phenomenon showing dispersion.

Question 24.
The lens of the eye focuses light on …………………..

Question 25.
The size of the pupil becomes ………………….. when we see in dim light.

True or False

Question 1.
Deficiency of vitamin B causes night blindness.

Question 2.
In the Braille system, patterns are made with coloured dots.

Question 3.
Normal make 60° angle with the reflecting surface.

Question 4.
Angle of incidence is always equal to angle of reflection.

Question 5.
Diffused reflection occurs due to rough surface.

Question 6.
Kaleidoscope is based on the principle of dispersion of light.

Question 7.
Both incident ray and reflected ray lie in the same plane.

Question 8.
The choroid prevents the internal reflection of light and protects the light sensitive inner parts of the eye.

Question 9.
Rainbow forms due to dispersion.

Question 10.
Rods are sensitive to bright light.

Question 11.
The iris is the coloured part of the eye.

Question 12.
Diffused reflection is due to the failure of laws of reflection.

Question 13.
Ciliary muscles changes the shape of the lens in the eye.

Question 14.
We should not wash our eyes.

Question 15.
Braille was designed by Louis Braille.

Question 16.
Cones are sensitive to dark light.

Question 17.
Too much light is good for eyes.

Question 18.
The size of the pupil becomes large when we see in dim light.

Question 19.
The angle of incidence is not equal to the angle of reflection in irregular reflection.

Question 20.
The angle between the normal and the incident rays is called the angle of incidence.

Match the following

 Column I Column II 1. Reflection (a) Regular reflection 2. Normal vision (b) bouncing back of light 3. Smooth surface (c) 25 cm 4. Kaleidoscope (d) Short-sightedness 5. Hypermetropia (e) Dispersion of light 6. Cornea (f) For visually challenged person 7. Rainbow (g) Multiple images 8. Blind spot (h) Front part of the eye 9. Braille system (i) Sensitive for bright light 10. Rods (j) Long-sightedness 11. Cones (k) Sensitive for dim light 12. Myopia (l) No sensory nerves 13. Retina (m) Cataract 14. Cloudy lens (n) Ability to focus 15. Accommodation power (o) Image formed