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Some Topics of Physics

According to me, these are some of the important stuff that you need to know about the topic Light and I am pretty sure that this page is really going to help you.
So let's  go!

1. Ray of Light : A line drawn in the direction of propagation of light is called a ray of light.
2. Beam of Light : A group of rays of light emitted by a source of light is called a beam of light. A light beam is of three types.
(i) Parallel beam : A group of light rays parallel to each other is known as parallel beam of light. 7.
(ii) Divergent beam : A group of light rays spreading out from a source of light is called divergent beam of light.
(iii) Convergent beam : A group of light rays meeting at a point is called convergent beam 8. of light.
3. Reflection of Light : There are some surfaces which have ability to send the light back in the same medium when light strikes it. This 9. phenomena of sending the light back in the same medium by a surface is called reflection of light.
(i) The incident ray, the reflected ray and the normal at the point of incidence, all lie in a same plane.
(ii) The angle of incidence is always equal to the angle of reflection, ∠i = ∠r.
4. Image : When light rays meet or appear to meet after reflection from a mirror,then it is called an image.
1. Real Image : It is a kind of image which is formed by actual intersection of light rays after reflection.
2. Virtual Image : It is a kind of image which is formed by producing the reflected rays backward after reflection.
5. Plane Mirror : Plane mirror is a piece of glass whose one side is polished by using silver paint, which is covered by a coating of red paint to protect the silver layer.
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