Class 8 Science Chapter 16 MCQ

Class 8 Science Chapter 16 MCQ (Multiple Choice Questions) of Light free to use without any login or password updated for new academic session 2021-2022. The complete chapter 16 of class 8 science is covered though NCERT including all the main concepts of the chapter.

All the questions are important in examination point of view. Answers and explanation of each equation is also given, so that students can understand easily.

Class 8 Science Chapter 16 MCQ for 2021-2022

Class: 8Science
Chapter: 16Light
Contents: MCQ with Answers and Explanation

MCQ Tests with Answers for Class 8 Science Chapter 16




Q1

The angle of reflection is equal to the angle of incidence:

[A]. Always
[B]. Sometimes
[C]. Under special conditions
[D]. Never
Q2

Which of the following statement is or are correct?

[A]. Light is a form of energy.
[B]. Light is needed to see things around us.
[C]. We cannot see objects in a dark room or in the darkness of light even when our eyes are wide open.
[D]. All the above.
Q3

Consider the following statements and choose the correct one:

[A]. The objects which emit their own light are called luminous object.
[B]. The objects which do not emit their own light are called non luminous object.
[C]. We can see the non-luminous objects because they reflect light (received from a luminous object) into our eyes.
[D]. All the above.
Q4

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

[A]. The ray of light which falls on the mirror surface is called incident ray.
[B]. The point at which the incident ray strikes the mirror is called the point of incidence.
[C]. The ray of light which is sent back by the mirror is called the reflected ray.
[D]. All the above.
Q5

Paheli is writing some statements, choose the correct statement and help her:

[A]. The normal is a line which is perpendicular to the mirror surface at the point of incidence.
[B]. The angle between incident ray and the normal is called the angle of incidence.
[C]. The angle between reflected ray and normal is called the angle of reflection.
[D]. All the above.




Q6

The least distance of distinct vision for a young adult with normal vision is about:

[A]. 25 m
[B]. 2.5 cm
[C]. 25 cm
[D]. 2.5 m
Q7

Which of the following statements is correct regarding rods and cones in the human eye?

[A]. Cones are sensitive to dim light.
[B]. Cones are sensitive to bright light.
[C]. Rods are sensitive to bright light.
[D]. Rods can sense color.
Q8

Badal appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. A sheet of paper produces diffuse reflection of light.
[B]. In a diffuse reflection, a parallel beam of incident light is reflected in different directions.
[C]. The diffuse reflection of light is not due to the failure of the laws of reflection.
[D]. All the above.
Q9

The image of an object formed by a plane mirror is:

[A]. Virtual
[B]. Real
[C]. Diminished
[D]. Upside-down
Q10

In a quiz competition, you are asked a question where you have to choose the statement which is/ are correct?

[A]. The image formed by a plane mirror is virtual and erect.
[B]. The image formed by a plane mirror is behind the mirror.
[C]. The image formed in a plane mirror is the same distance behind the mirror as the object is in front of it.
[D]. All the above.



Q11

Which of the following is a non-luminous object?

[A]. Sun
[B]. Star
[C]. Moon
[D]. Fire
Q12

In a science quiz competition, Payel is asked a question where she had to choose the statement which was/were correct?

[A]. An optical instrument in which reflected light is reflected again is a periscope.
[B]. A periscope is a long, tubular device through which a person can see object that are out of the direct line of sight.
[C]. A periscope works on the reflection of light from two plane mirrors arranged parallel to one another.
[D]. All the above.
Q13

The number of images formed of an object placed between two plane mirrors inclined at right angle to each other is:

[A]. Two
[B]. Five
[C]. One
[D]. Three
Q14

The deficiency of one of the following in the diet of a person for a considerable time can lead to a disease called night blindness. This one is:

[A]. Vitamin B
[B]. Vitamin D
[C]. Vitamin A
[D]. Vitamin C
Q15

Which of the following is not a part of the human eye?

[A]. Retina
[B]. Auditory nerve
[C]. Optic nerve
[D]. Ciliary muscle



Q16

Which of the following change occur when you walk out of bright sunshine into a poorly lit room?

[A]. The pupil becomes larger
[B]. The lens becomes thicker
[C]. The ciliary muscle relaxes
[D]. The pupil becomes smaller
Q17

Consider the following statements and choose the correct one:

[A]. Rods are the rod-shaped cells present in the retina of an eye which are sensitive to dim light.
[B]. Cones are the cone shaped cells present in the retina of an eye which are sensitive to bright light or normal light.
[C]. The blind spot is a small area of the retina insensitive to light where the optic nerve leaves the eye.
[D]. All the above.
Q18

Which of the following produces diffuse reflection of light?

[A]. Mirror on a dressing table
[B]. Water surface of a pond
[C]. Screen in a cinema hall
[D]. Polished wooden table
Q19

The change in converging power of an eye-lens is caused by the action of:

[A]. Iris
[B]. Ciliary muscles
[C]. Optic nerve
[D]. Retina
Q20

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. The eye lens is a convex lens made of a transparent and flexible material like jelly.
[B]. The eye lens is held in position by ciliary muscles.
[C]. The ciliary muscles can change the curvature of eye-lens and make it thin or thick according to the need of the eye.
[D]. All the above.




Q21

The size of the pupil of the eye is adjusted by:

[A]. Cornea
[B]. Ciliary muscles
[C]. Optic nerve
[D]. Iris
Q22

Boojho appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. Kaleidoscope is an instrument or toy containing inclined plane mirrors which produce multiple reflection of colored glass pieces.
[B]. If an object is placed between two parallel plane mirrors facing each other, then theoretically, an infinite number of images should be formed.
[C]. Kaleidoscope are used by designers of wallpapers and fabrics, as well as by artist to get ideas for new patterns.
[D]. All the above.
Q23

Consider the following statements and choose the incorrect one:

[A]. When two plane mirrors are kept inclined at angle, they can form multiple images of an object.
[B]. Two plane mirrors are inclined at an angle of 90 degree from three images of an object placed between them.
[C]. As the angle between the two plane mirrors decreases, the number of images formed increases.
[D]. None of the above
Q24

A person cannot see the distant object clearly (through he can see the nearby objects clearly). He is suffering from the defect of vision called:

[A]. Hypermetropia
[B]. Myopia
[C]. Night blindness
[D]. Cataract
Q25

The impression or sensation remains on the retina for about how many seconds even after removal of the object.

[A]. 1 second
[B]. 1/16th of a second
[C]. 16 seconds
[D]. 1 minute

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