 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 2023-24.

## 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 2023-24

### Class 10 Science Chapter 9 MCQ Online Test for 2023-24

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 2023-24.

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

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

[A]. The process of sending back the light rays which fall on the surface of an object, is called reflection of light.
[B]. An aluminum metal is one of the worst reflectors of light.
[C]. The objects having polished surface reflect more light than objects having unpolished, dull surface.
[D]. The reflection of light in a plane mirror takes place at the silver surface in it.
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

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

[A]. A virtual image is formed when light rays coming from an object only appear to meet at a point when produced backwards, after reflection from a mirror.
[B]. A real image is formed when light rays coming from an object actually meet at a point after reflection from a mirror or refraction through a lens.
[C]. The image which can be obtained on a screen is called a virtual image.
[D]. While watching a movie in a cinema hall, we see the images of actors and actresses on the cinemas screen and it is an example of real image.
Q6

#### 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.
Q7

#### 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
Q8

#### 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.
Q9

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

[A]. The bending of light when it goes from one medium to another obliquely is called refraction of light.
[B]. The refraction of light take place at the boundary between the two media.
[C]. The speed of light in air is 3 x 10 to power 18 m/s whereas that in glass is 2 x 10 to power 8 m/s.
[D]. Greater the difference in the speed of light in the two media, greater will be the amount of refraction or bending of light.
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

#### 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.
Q12

#### 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.
Q13

#### 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.
Q14

[A]. 30°
[B]. 60°
[C]. 90°
[D]. 120°
Q15

[A]. 45°
[B]. 90°
[C].
[D]. 60°
Q16

[A]. 2 cm
[B]. 4 cm
[C]. 10 cm
[D]. 22 cm
Q17

#### A concave mirror produces magnification of +4. The object is placed:

[A]. At the focus
[B]. Between focus and centre of curvature
[C]. Between focus and pole
[D]. Beyond the centre of curvature
Q18

#### 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
Q19

#### Which of the following can make a parallel beam of light when light from a point source is incident on it?

[A]. Concave mirror as well as convex lens
[B]. Convex mirror as well as concave lens
[C]. Two plane mirrors placed at 90o to each other
[D]. Concave mirror as well as concave lens
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

#### Magnification produced by a rear-view mirror fitted in vehicles

[A]. Is less than one
[B]. Is more than one
[C]. Is equal to one
[D]. Can be more than or less than one depending upon the position of the object in front of it
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.

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Last Edited: April 26, 2023