Suppose you are in a dark room. Can you see object in the room? Can you see objects outside the room. Explain.
In a dark room we are not able to see the objects around us. The absence of light in a dark room does not enable us to see the objects in the dark room. Whereas, outside the room light is present. This light which falls on the object is reflected back and goes into our eyes. Hence, we see the objects on which the light falls.
Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case.
Chalk powder
Chalk particles are not smooth. Therefore diffused reflection will take place on it's surface.
Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case.
Cardboard surface
Cardboard surface has minute irregularities on it, so it will have a diffused reflection.
Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?
|
Regular reflection |
Diffused reflection |
|
(i) It takes place on a smooth surface. (ii) All the reflected rays are parallel to each other. (iii) Reflected rays are in one direction. |
(i) It takes place on a rough surface. (ii) Reflected rays are not parallel. (iii) Reflected rays are scattered in different directions.
|
Switch
