Chapter 10  Light Reflection and Refraction 

Chapter 10 of the NCERT notes for 10th Grade Science covers the topic of reflection and refraction. In Science Year 10, Chapter 10, “Light,” students learn the phenomena of reflection and refraction of light using the straight-line propagation of light. This chapter discusses the reflection of light by spherical mirrors, so its application in real situations is studied.

Students can access NCERT notes for Class 10 Science Chapter 10 on Vidyakul. Vidyakul provides over 1000 exercises from over 20 books for this chapter. These exercises will help you prepare for the exam more easily.

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CBSE CLASS 10th SCIENCE CH-10

Points to Remember

While studying, the important points to remember from this chapter are as follows:

• The angle of incidence equals the angle of reflection.

• All distances parallel to the main axis are measured from the mirror’s pole.

• At the point of incidence, the incident ray, reflected ray, and normal drawn to the reflecting surface all lie in the same plane.

• A concave mirror is one that has been polished from the outer side of a hollow sphere so that the reflecting side is facing the hollow side.

• A convex mirror is one that has been polished from the hollow side of the sphere so that the reflecting surface is towards the bulging side.

• The object is always positioned to the left of the mirror. This implies that the light from the object falls on the mirror from the left side.

Topics and Sub- topics

Light is a form of energy that allows us to see things. Light starts from a light source and bounces off objects perceived by our eyes, and our brains process these signals to ultimately see. This led Maxwell to propose that light itself is transmitted by electromagnetic waves, that is, that light is a form of electromagnetic radiation.

Vidyakul provides notes to each question in the Year 11 Chapter 10 Physics textbook, taking into account the latest programs. Students can access the notes for free and practice to get the highest score on the final exam. 

Students can refer to the topics present in Chapter 10 Physics as mentioned below:

Sr. No.	Topic Name
10.1	Reflection of Light
10.2	Spherical Mirrors
10.2.1	Image Formation by Spherical Mirrors
10.2.2	Representation of Images Formed by Spherical Mirrors Using Ray Diagrams
10.2.3	Sign Convention for Reflection by Spherical Mirrors
10.2.4	Mirror Formula and Magnification
10.3	Refraction of Light
10.3.1	Refraction Through Rectangular Glass Slab
10.3.2	The Refractive Index
10.3.3	Refraction by Spherical Lenses
10.3.4	Image Formation by Lenses
10.3.5	Image Formation in Lenses Using Ray Diagrams
10.3.6	Sign Convention for Spherical Lenses
10.3.7	Lens Formula and Magnification
10.3.8	Power of Lens

Few Important Questions

• Refractive index of diamond is 2.42 and that of carbon disulphide is 1.63. Calculate refractive index of diamond with respect to carbon disulphide?

Refractive index of diamond with respect to carbon disulphide will be 1.48.

• An object kept at 20 cm from a spherical mirror gives rise to an image 15 cm behind the mirror. What is the focal length of the mirror?

The focal length of the mirror is 60 cm.

• A 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Find the size of the image formed.

The height of the image is 0.6 cm.

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