Updated on April 26, 2023, 11:04 AM
by Tiwari Academy
by Tiwari Academy
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
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
Q7
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.
Q8
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.
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
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
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
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.
Q14
The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and reflected ray will be:
[A]. 30°
[B]. 60°
[C]. 90°
[D]. 120°
Q15
A ray of light is incident on a plane mirror making an angle of 90° with the mirror surface. The angle of reflection for this ray of light will be:
[A]. 45°
[B]. 90°
[C]. 0°
[D]. 60°
Q16
According to New Cartesian Sign Convention:
[A]. Focal length of concave mirror is positive and that of convex mirror is negative
[B]. Focal length of both concave and convex mirrors is positive
[C]. Focal length of both concave and convex mirrors is negative
[D]. Focal length of concave mirror is negative and that of convex mirror is positive
Q17
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
Q18
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
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 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
Q21
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
Q22
A full-length image of a distant tall building can definitely be seen by using
[A]. A concave mirror
[B]. A convex mirror
[C]. A plane mirror
[D]. Both concave as well as plane 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
You are given water, mustard oil, glycerin and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?
[A]. Kerosene
[B]. Water
[C]. Mustard oil
[D]. Glycerin
Class 10 Science Chapter 9 Extra Questions
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
