Class 10 Science Chapter 10 MCQ

Class 10 Science Chapter 10 MCQ (Multiple Choice Questions) of Light – Reflection and Refraction. To score better and clear the doubts in Chapter 10 of 10th standard science, MCQs plays an effective role.

These MCQ Quiz includes almost all the intext questions as well as exercises questions also. MCQs are important for examination point of view in academic session 2020-2021.

Class 10 Science Chapter 10 MCQ with Answers for 2020-2021

Class: 10Science
Chapter: 10Light – Reflection and Refraction
Contents:MCQ Online Tests with Answers and Explanation

Class 10 Science Chapter 10 MCQ Online Test for 2020-2021

Class 10 Science Chapter 10 MCQ Online Test with explanation and answers are given below. These are practice questions for the preparation of school exams and class tests also. All the questions and answers are confined to latest NCERT Textbooks for class x Science issued for academic session 2020-2021.

Q1

Anjali is writing some statements, choose the correct statement and help him:

[A]. The point at which the incident ray falls on the mirror is called the point of incidence.
[B]. The angle of incidence is the angle made by the incident ray with the normal at the point of incidence.
[C]. The normal is a line at right angle to the mirror surface at the point of incidence.
[D]. All the above
Q2

Consider the following statements and choose the correct one:

[A]. The phenomenon of lateral inversion is due to the reflection of light.
[B]. In the plane mirror, the right side of our body becomes left side in the image, whereas the left side of our body becomes right side in the image.
[C]. The nature of image formed by a plane mirror is virtual and erect and the size of image formed by a plane mirror is equal to that of the object.
[D]. All the above.




Q3

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

[A]. A concave mirror is that spherical mirror in which the reflection of light takes place at the concave surface or bent in surface.
[B]. A convex mirror is that spiracle mirror in which the reflection of light take place at the convex surface or bulging out surface.
[C]. A spherical mirror works on the reflection of light.
[D]. All the above
Q4

These days New Cartesian Sign convention is used for measuring the various distance in the ray diagrams of spherical mirror. Choose the correct statements:

[A]. Distance measure downward and perpendicular to the principal axis are taken as negative.
[B]. Distance measured upward and perpendicular to the principal axis are taken as positive.
[C]. Distances measured against the direction of incident light are taken as negative.
[D]. All the above.




Q5

In a science quiz competition, Ritika are asked a question where she had to choose the statement which was/were incorrect?

[A]. Light waves travel faster in air but slower in glass.
[B]. The fact that the speed of light waves on one side of a beam of light changes a little before the change in speed of light waves on its other side, causes a change in the direction of light.
[C]. The refraction of light or change in direction of light on going from one medium to another can be explained by using the “wave theory” of light.
[D]. When light waves move from air into glass, their speed decreases but their wavelength increases.
Q6

Which of the following statement is or are incorrect?

[A]. The stars appear to twinkle on a clear night.
[B]. When a thick glass slab is placed over some printed matter, the letters appear raised when viewed from the top.
[C]. A pool of water appears to be more deep than it actually is.
[D]. A stick pencil held obliquely and partly immersed in water appears to be bent at the water surface.
Q7

An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is:

[A]. 2 cm
[B]. 4 cm
[C]. 10 cm
[D]. 22 cm
Q8

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

[A]. – 30 cm
[B]. – 20 cm
[C]. – 40 cm
[D]. – 60 cm



Q9

Under which of the following conditions a concave mirror can form an image larger than the actual object?

[A]. When the object is kept at a distance equal to its radius of curvature [B] When object is kept at a distance less than its focal length [C] When object is placed between the focus and center of curvature [D] When object is kept at a distance greater than its radius of curvature
Q10

Which of the following statements is true?

[A]. A convex lens has 4 diopter power having a focal length 0.25 m
[B]. A convex lens has –4 diopter power having a focal length 0.25 m
[C]. A concave lens has 4 diopter power having a focal length 0.25 m
[D]. A concave lens has –4 diopter power having a focal length 0.25 m
What do you know about the diffraction of light?

If an opaque object on the path of light becomes very small, light has a tendency to bend around it and not walk in a straight line – an effect known as the diffraction of light.

Why do we use Convex mirrors as rear-view mirrors?

Convex mirrors are normally used as rear-view mirrors in vehicles. These mirrors are preferred because they always give an erect image. They have a wider field of view as they are curved outwards. In this way, convex mirrors enable the driver to view much larger area than would be possible with a plane mirror.

What is Snell’s law of refraction?

During the refraction of light, the ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is also known as Snell’s law of refraction.

What is meant by Power of a Lens?

The ability of a lens to converge or diverge light rays depends on its focal length. The power of a lens is defined as the reciprocal of its focal length.



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