Class 10 Science Chapter 9 MCQ (Multiple Choice Questions) of Light – Reflection and Refraction. To score better and clear the doubts in Chapter 9 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 2024-25.

## Class 10 Science Chapter 9 MCQ with Answers

 Class: 10 Science Chapter: 9 Light – Reflection and Refraction Contents: MCQ Online Tests with Answers and Explanation Session: CBSE 2024-25

### Class 10 Science Chapter 9 MCQ Online Test for 2024-25

Class 10 Science Chapter 9 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 2024-25.

Q1

#### Which of the following statement is or are correct?

[A]. Light travels in a straight line.
[B]. Those objects which do not emit light themselves but only reflect the light which falls on them, are called non luminous objects.
[C]. Light enables us to see objects from which it come or from which it is reflected.
[D]. All the above
Q2

#### Consider the following statements and choose the incorrect one:

[A]. According to wave theory, light consists of electromagnetic waves which do not require a material medium for their propagation.
[B]. According to particle theory, light is composed of particle which travel in a straight line at very high speed.
[C]. The modern theory of light called “Quantum theory of light” combines both the wave and particle models of light.
[D]. None of the above
Q3

#### 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
Q4

#### Atharva is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?

[A]. According to the second law of reflection of light, the angle of reflection is always equal to the angle of incidence.
[B]. According to the first law of reflection of light, the incident ray, the reflected ray and the normal all lie in the same plane.
[C]. A ray of light which is incident normally on a mirror, is reflected back along the same path.
[D]. The laws of reflection of light applied to plane mirrors which have smooth surface.
Q5

#### Read the following sentences carefully, and choose the incorrect one:

[A]. The image formed in a plane mirror is virtual, it cannot be received on a screen.
[B]. The image formed in a plane mirror is erect, it is the same side up as the object.
[C]. The image in a plane mirror is of the same size as the object.
[D]. The image formed by a plane mirror is at the difference distance behind the mirror as the object is in front of the mirror.
Q6

#### Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. The centre of curvature of a concave mirror is in front of it but the centre of curvature of a convex mirror is behind it.
[B]. The straight line passing through the centre of curvature and pole of a spherical mirror is called aperture of the mirror.
[C]. The portion of a mirror from which the reflection of light actually takes place is called the principal axis.
[D]. None of the above.
Q7

#### Rahul is writing some statements or rules for obtaining images formed by concave mirror. Choose the incorrect statements:

[A]. A ray of light which is parallel to the principal axis of a concave mirror, passes through its focus after reflection from the mirror.
[B]. A Ray of light passing through the centre of curvature of a concave mirror is reflected back along the same path.
[C]. A ray of light passing through the focus of a concave mirror becomes same to the principal axis after reflection.
[D]. A ray of light which is incident at a pole of a concave mirror is reflected back making the same angle with the principal axis.
Q8

#### When an object is placed between the pole and focus of a concave mirror the image formed is:

[A]. Behind the mirror
[B]. Virtual and erect and,
[C]. Larger than the object or magnified
[D]. All the above
Q9

#### In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. Large concave mirrors are used in the field of solar energy to focus sun’s ray for heating solar furnaces.
[B]. Concave dishes are used in TV Dish antenna to receive TV signals from the distant communication satellites.
[C]. Concave mirrors are used as doctor’s head-mirror to focus light coming from a lamp on to the body parts of a patient (such as eyes, ear etc.) to be examined by the doctor.
[D]. Concave mirrors are not used in torch or vehicle headlights.
Q10

#### 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 angle between incident ray and normal is called the angle of incidence.
[B]. The angle between the refracted ray and the normal is called the angle of refraction.
[C]. In refraction of light, the angle of refraction is usually not equal to the angle of incidence.
[D]. All the above.
Q11

#### 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.
Q12

#### Which of the following statement is or are incorrect?

[A]. A medium in which the speed of light is more is known as optically rarer medium (or less dense medium).
[B]. A medium in which the speed of light is less, is known as optically denser medium.
[C]. When a ray of light goes from a rarer medium to denser medium, it bends towards the normal.
[D]. When a ray of light goes from a denser medium to rarer medium, it bends towards from the normal.
Q13

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

[A]. When a beam of light travelling in water enters into air, it bends towards the normal.
[B]. When a ray of light goes from air into water, it bends towards the normal.
[C]. The angle which the emergent ray makes with the normal is called the angle of emergence.
[D]. The perpendicular distance between the original path of incident ray and the emergent ray coming out of the glass slab is called lateral displacement of the emergent ray of light.
Q14

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

[A]. Always
[B]. Sometimes
[C]. Under special conditions
[D]. Never
Q15

#### The image formed by a plane mirror is:

[A]. Virtual, behind the mirror and enlarged.
[B]. Virtual, behind the mirror and of the same size as the object.
[C]. Real, at the surface of the mirror and enlarged.
[D]. Real, behind the mirror and of the same size as the object.
Q16

#### One of the following does not apply to a concave mirror. This is:

[A]. Focal length is negative
[B]. Image distance can be positive or negative
[C]. Image distance is always positive
[D]. Height of image can be positive or negative
Q17

#### Linear magnification produced by a concave mirror may be:

[A]. Less than 1 or equal to 1
[B]. More than 1 or equal to 1
[C]. Less than 1, more than 1 or equal to 1
[D]. Less than 1 or more than 1
Q18

#### In order to obtain a magnification of −2 (minus 2) with a concave mirror, the object should be placed:

[A]. Between pole and focus
[B]. Between focus and centre of curvature
[C]. At the centre of curvature
[D]. Beyond the centre of curvature
Q19

#### If a magnification of, −1 (minus one) is to be obtained by using a converging mirror, then the object has to be placed:

[A]. Between pole and focus
[B]. At the centre of curvature
[C]. Beyond the centre of curvature
[D]. At infinity
Q20

[A]. – 30 cm
[B]. – 20 cm
[C]. – 40 cm
[D]. – 60 cm
Q21

#### 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
Q22

#### Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?

[A]. 15 cm in front of the mirror
[B]. 30 cm in front of the mirror
[C]. Between 15 cm and 30 cm in front of the mirror
[D]. More than 30 cm in front of the mirror
Q23

#### In torches, search lights and headlights of vehicles the bulb is placed

[A]. Between the pole and the focus of the reflector
[B]. Very near to the focus of the reflector
[C]. Between the focus and center of curvature of the reflector
[D]. At the center of curvature of the reflector
Q24

#### The laws of reflection hold good for

[A]. Plane mirror only
[B]. Concave mirror only
[C]. Convex mirror only
[D]. All mirrors irrespective of their shape
Q25

[A]. Kerosene
[B]. Water
[C]. Mustard oil
[D]. Glycerin

### 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.