Mobsea Logo
Home

Why Objects are Visible

Simple Science

<
^
>

Why Objects are Visible

Light:
If the beam of light falls upon a sheet of paper, or upon a photograph, instead of upon a smooth polished surface, no definite reflected ray will be seen, but a glare will be produced by the scattering of the beam of light. The surface of the paper or photograph is rough, and as a result, it scatters the beam in every direction. It is hard for us to realize that a smooth sheet of paper is by no means so smooth as it looks. It is rough compared with a polished mirror. The law of reflection always holds, however, no matter what the reflecting surface is, - the angle of reflection always equals the angle of incidence. In a smooth body the reflected beams are all parallel; in a rough body, the reflected beams are inclined to each other in all sorts of ways, and no two beams leave the paper in exactly the same direction.

Hot coals, red-hot stoves, gas flames, and candles shine by their own light, and are self-luminous. Objects like chairs, tables, carpets, have no light within themselves and are visible only when they receive light from a luminous source and reflect that light. We know that these objects are not self-luminous, because they are not visible at night unless a lamp or gas is burning. When light from any luminous object falls upon books, desks, or dishes, it meets rough surfaces, and hence undergoes diffuse reflection, and is scattered irregularly in all directions. No matter where the eye is, some reflected rays enter it, and the various objects are clearly seen.


FIG. - The surface of the paper, although smooth in appearance, is in reality rough, and scatters the light in every direction.


<
^
>

A Battery of Cells
How Chills are Caused
The Value of Lenses
Water Wheels
Hot water Heating
The Structure of the Ear
Simple Molecules
Windmills
Why the Water Supply is not uniform in All Parts of the City
How Lenses Form Images
Chemical Effects
Weather Maps
More ...


Test your English Language
Celebrities Who Died Under Mysterious Circumstances
Benefits of Kale
The Beautiful Brazil
Foods That Are So Much Better Fried
Emperor Ashoka
Best Foods for Healthy Eyes
Best HD Games for IOS and Android
Forever Young Naturally Lifestyle
Top Fishes of India
Rules to play Bull Fighting
Handy Health Advices
Rules to play Bobsleigh
Toys Your Child Will Want This Holiday Season
The worlds most Powerful Road Cars
Amazing beauty Secrets
Cartoon Characters
Cartoons Characters That You Wish Were Real
Celebration of Dhanteras