Light: the concept explained from A to Z

Senses are important! We can see, feel, listen and taste through our senses. One of the vital senses is sight. In addition, there is a thing that makes us see the things around us, light. When you go through NCERT solutions for class 8 science, you will have a read about how we can see objects.

This chapter enlightens various concepts connected to light, visibility via eyes, and other related ideas. Earlier, you did study the basics in class 7. Further, class 8 also reveals some crucial concepts of light. In this post, we will tell you about some terms related to chapter light in class 8 science. In addition, you will have an idea about A to Z concepts about light.

Light: meaning and significance

Suppose you have closed windows and doors of the room. There is darkness. But, from a tiny opening of a window, you observe a bright beam that enlights the area. That is light.

Light is a form of energy. Basically, it is the radiation that is observed by the eyes. The properties of light make it visible. You may watch out for the light from cars, headlamps, batteries, or torches. Light enables you to see the objects. It literally lightens up the particular area.

Light traverses in the form of waves. In addition, it traverses in a straight line. Furthermore, there are two types of light. One is the natural light that comes from the sun, fire, etc. Another one is manmade light. For example, you can light up the candle and get the light. Also, you can observe electrically generated light from lightbulbs and tube lights.

Reflection of light

This is one of the most significant concepts. When a beam of light traversing meets the smooth surface, it lets the beam rebound. Hence, it is known as a reflection of light. In addition, the ray that bounced back is known as a reflected ray. Further, it follows the rules or laws of reflection.

There are two other important concepts, the incident angle and the reflected angle. The ray that meets the surface is called an incident ray, and the ray that bounces back is the reflected ray. Moreover, suppose you draw a perpendicular to the surface, known as normal. In that case, the angle between normal and incident ray is the incident angle, and the angle between the reflected ray and normal is called the reflected angle.

Experiments with mirror

In science education, experiments will help you understand the concepts more quickly. Also, learning by performing experiments is the most effective way to comprehend complex concepts. The notion of light is one such thorough concept. Mirror reflection is one such part of the chapter that is well understood with experiments.

A mirror is one of the essential concepts in this chapter. In addition, it can be used to study reflections properly. In addition, a mirror switches the path of a ray meeting it. You will better understand it when you handle various experiments.

For example, when you have a plane mirror for an experiment, you will observe that the mirror image of the entity has the exact size of the entity. In addition, the mirror image has an inverted vision. Similarly, various experiments can be performed with convex and concave mirrors to understand reflections of light better.

What else is there in class 8 science chapter 16 light?

Class 8 science chapter light consists of various terms. In addition to talking about light and its related concepts, it explains its visibility. It explains how we can see via our eyes and its correlation to light. Also, you will have a quick read about taking care of your eyes.

How are we able to see things? The correlation between light and eyes

What is that makes you or everyone see things?

There must be something inside our eyes that makes us see the things around us.

The eye is one of the essential features of our body. We are able to see things because of our eyes. Is it? Well, when the light from any entity enters the eye, we can see those objects. The elements of an eye are cornea, pupil, iris, retina, cones, rods, etc. In chapter 16 of class 8 science, you will also read about the concepts such as blind spots.

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What can you do to keep your eyes healthy?

To have a good and clear vision, it is vital that you have healthy eyes. In addition, the eye is an essential organ and sense of the body. So, here we present a few tips to take care of your eyes.

  • Keep your eyes clean and wash them with cold water often.
  • While reading, make sure you have proper light. Otherwise, it will damage the retina.
  • Visit an eye expert for any trouble in vision.
  • Make use of specs if suggested by the doctor.
  • Avoid looking at sunlight or other bright light directly.
  • While reading, maintain a proper distance from a book or tablet to your eyes. Don’t keep it very close or farther.
  • If you find some itching near or in your eyes, wash them with clean water. Please don’t scratch it. Visit an expert if required.
  • Eat a healthy and balanced diet rich in vitamins to keep your eyes healthy.


Science is not only a subject to by heart the things. Well, neither is any subject! But science deals with practical things more. Therefore, you need to understand theory and experiments both. Also, concepts in the current year are useful in the next year. For example, both class 7 and class 8 science have details of light.

We hope you have understood the topics mentioned above. Read, learn and understand the points mentioned above in the post. In addition, do not forget to study well about eye diagrams. An eye diagram class 8 is one of the essential things to understand and score.

While learning science, remember to read, understand, experiment, and master!

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