## NCERT Solutions for Class 10 Science Chapter 10 - Light Reflection and Refraction

**Study without Internet (Offline)**

1. Why do Vehicles have Convex-Shaped Rear View Mirrors?

A convex mirror is used as a rearview mirror in vehicles as it gives a more extensive field of view, which causes the driver to see the vast majority of the traffic behind him. Convex mirrors consistently structure an erect, virtual and decreased picture of the things set in front of it.

2. What is Meant by 1 Dioptre of Power of Lens?

Dioptre is the SI unit of intensity of focal point and is denoted by the letter D. 1 dioptre can be characterized as the intensity of a focal point/power of a lens of central length 1 metre.

3. What are the concepts covered in Chapter 10 of Class 10 Science?

The concepts included in this chapter are:

Reflection of Light

Spherical Mirrors

Image Formation by Spherical Mirrors

Representation of Images Formed by Spherical Mirrors Using Ray Diagrams

Sign Convention for Reflection by Spherical Mirrors

Mirror Formula and Magnification

Refraction Of Light

Refraction through a Rectangular Glass Slab

The Refractive Index

Refraction by Spherical Mirrors

Image Formation by Lenses

Image Formation by Lenses Using Ray Diagrams

Sign Convention for Spherical Lenses

Lens Formula and Magnification

Power of a Lens

4. Where can I get the NCERT Solutions of Chapter 10 of Class 10 Science?

Students will find the NCERT Solutions of Chapter 10 of Class 10 Science on the website of Vedantu.

Visit the page-NCERT Solutions for Chapter 10 of Class 10 Science.

This link will take you to the official webpage of Vedantu (vedantu.com).

There you will find the PDF file of the NCERT Solution of Chapter 10 of Class 10 Science.

Click on the option of “Download PDF” which is at the top of the PDF file.

The file will get downloaded free of cost after clicking the option.

You can also download solutions from the Vedantu app.

5. What do you understand about the refraction of light? Also, state the laws of refraction of light.

Refraction of light is the process in which the direction and speeds of light change when moving from one medium to another.

Laws of Refraction of Light:

The normal, the incident ray and the refracted ray all lie in the same plane.

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for the light of a given colour and for the given pair of media. This law is known as Snell's law.

6. What is meant by the term magnification of spherical mirrors?

The magnification of spherical mirrors is defined as the ratio of the height of the image to the height of the object. It is denoted by ‘m’. This magnification is also described in terms of object and image distance. The negative ratio of the image distance to the object distance is known as magnification. The negative magnification shows that images are real. The positive sign in the value of magnification tells that the image is virtual.

7. Write a short note on the power of a lens.

The power of a lens is defined as the ability of the lens to diverge or converge the light rays depending on the focal length. The short focal length of the concave lens causes higher divergence than the one with a longer focal length. The power of the lens is also defined as the reciprocal of its focal length. It is denoted by “P”. The SI unit of power of the lens is ‘dioptre’. 1 dioptre is described as the power of a lens whose focal length is 1 metre.