CBSE Class 8 Science Light Chapter Notes

Read and download free pdf of CBSE Class 8 Science Light Chapter Notes. Students and teachers of Class 8 Science can get free advanced study material, revision notes, sure shot questions and answers for Class 8 Science prepared as per the latest syllabus and examination guidelines in your school. Standard 8 students should download this study material which will give them more knowledge for all chapters in Science and all important topics which are scoring and can get you more marks. Students should also download free pdf of Chapter wise Notes for Class 8 Science prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this year and also download free worksheets and question papers available here to get higher scores in school exams and tests, also click here for more Study Material for Class 8 Science

CBSE Class 8 Science Light Chapter Notes. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations.  Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.


Light is a form of energy which produces the sensation of sight. Light is electromagnetic wave which does not require any material medium for its propagation. The speed of light waves depend on the nature of the medium through which they pass.

Reflection of Light
The process of bouncing back of the light to the same medium after striking the surface of another medium is called reflection.
A surface which reflects the light is called reflector. Silver metal is one of the best reflectors of light. A highly polished surface, such as a mirror, reflects most of the light falling on it.

Types of reflection: There are two types of reflection

Regular Reflection: When a parallel beam of light falls on a smooth and highly polished surface, then the reflected beam is also parallel and directed in a fixed direction. Such type of reflection is called regular reflection. For example, light reflected from search light, automobile head lights, etc.


Diffused Reflection: When a parallel beam of light falls on a rough surface, then the reflected light is not parallel but spreads in all directions, such type of reflection of light is called irregular or diffused reflection. For example, light reflected from the wooden surface.

Laws of Reflection
The reflection of light from a plane surface or from a spherical surface takes place according to two laws which are:
i) The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the same plane.

ii)The angle of incidence is equal to the angle of reflection (i.e., Ði = Ðr). 


These laws of reflection are applicable to all types of reflecting surfaces such as plane surface, spherical surfaces or any irregular surface.

Formation of Image by Plane Mirror
Consider a point object O placed infront of a plane mirror MM´. The mirror will form an image I of the object O. Here, two reflected rays AB and CO when produced backward, they meet at a point behind the mirror and hence form the virtual image I at that point


Properties of Images formed by a Plane Mirror
i) The image formed by a plane mirror is virtual and erect.
ii) The distance of the object from the mirror is equal to the distance of the image from the mirror.
iii) The size of the image is equal to the size of the object.
iv) The linear magnification produced by a plane mirror is unity. i.e., m = v/u= h'/h=1
v) The image formed is laterally inverted, i.e., the left side of the image appears to the right side and viceversa.

Uses of Plane Mirror
i) Plane mirror is used as a looking glass.
ii) Plane mirror is used in solar cooker to reflect the sun light.
iii) Plane mirrors are used in periscopes usually used in submarines.
iv) Plane mirros are used in barber’s shop to see the back portion of the head.

In the following videos we have explained you about the concept of Light and its properties. Watch this video to understand the concepts and also post your questions and comments in the comments section

Part 1

Part 2


Please click the link below to download CBSE Class 8 Science Light Chapter Notes



Click to View or Download pdf file
Click for more Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE Assessment Framework

The Central Board of Secondary Education (CBSE) today, announced a suggested competency-based assessment framework to strengthen India’s existing school education system for secondary level (classes 6-10) and improve the overall learning outcomes of students across...

FAQs on Policy for Tabulation of Marks for Class 10 Board Exams

ON POLICY Question.1 How CBSE will declare the result of Class-X? Answer. Results of Class X Board will be declared on the basis of an objective criterion developed by the Board vide Notification no.CBSE/CE/2021 dated 01.05.2021. Question.2. If any candidate is not...

Latest CBSE Syllabus for 2021 2022 PDF Download

Latest Syllabus for Class 12 for 2021 2022 Latest Syllabus for Class 11 for 2021 2022 Latest Syllabus for Class 10 for 2021 2022 Latest Syllabus for Class 9 for 2021 2022 CBSE has issued the latest syllabus for the academic year 2021 2022 which is applicable for all...

CBSE asks schools to load Class 12 Internal Assessment Marks

This has a reference to the letter no CBSE/COORD/2021 dated 11.02.2021 regarding conduct of the School-Based Assessment (Internal Assessment/Practical/ Project) of Class-XII and uploading the marks by 11.06.2021. It has been observed that some schools have not been...

Class 10 Boards Cancelled Class 12 postponed

Looking to the present situation of the pandemic and school closures, and also taking in account the safety and well-being of the students, it is decided as follows:   1. The Board Exams for Class XIIth to be held from May 4th to June, 14th, 2021 are hereby postponed....

Time management for CBSE students

The first thing to learn about Time Management is that time is theoretical so you can’t really manage it. What you do when you get into time management, is that you manage yourself. You decide what has to be done, when it must be done and how to do it in the stipulated...

Studies Today