# 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: 10 Science Chapter: 10 Light – 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

#### 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
Q2

#### 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.

Q3

#### 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.
Q4

#### 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.

Q5

#### 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.
Q6

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

[A]. According to the first law of refraction of light, the incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane.
[B]. According to Snell’s law of refraction of light, the ratio of sine of angle of incidence to the sine of angle of refraction is constant for a given pair of media.
[C]. The refractive index of a medium gives an indication of the light bending ability of that medium.
[D]. All the above.
Q7

#### 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
Q8

#### 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

Q9

#### 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
Q10

#### 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
##### 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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