Visible light definition and energy

The Light energy

 

We can not see the energy by our naked eyes except one type of energy known as sun light,  this is the only type of energy which is visible for human eyes. But other animals can see hidden part of lights.

 

The beam of light, actually it is mix up of different colors, that why every colors has different wavelength to other. Some has longest wavelength some has shortest wavelength.

 

Sun is the biggest source of light energy. While is millions of mile far from us, it emits huge amount of light energy.

 

The fastest things on this earth is speed of light, which travels 300000 km/s in air.  This is faster than the speed of anything else! But speed of light is not same every where, it began to change during change of mediums. The speed fasted speed of light are, vacuum> air> water> glass> and so on.

 

All things ( all living things, human, animals, fishes, trees, rivers, mountains, etc) which are surviving on this planet cant be survive without sun light.

 

Trees absorb light energy from sun, convert it into making  their food, Humans and animals would be unable to see anything without light energy.

  Other source of light are street bulb or home bulb and fire, torch.

 

Animals in field with sunlight

Flowers with sunlight

Illuminated bulb

Light dark combination

Leaf making food under sunlight

Tiger under sunlight

Shadow games

ABOUT  SHADOWS

Shadows are nothings, but it just black images of every opaque body made by stopping lights to pass through it.

 

Opaque objects is define as, all those object are said to be an opaque object  from which no light can pass through it. e.g, tree, book, table, home, umbrella, car etc.

 

There are no fix shape and size of shadow of any opaque object, shadows can change their shape and size place to place, time to time. But we know that an opaque object cant change their shape and size during time or place change.

 

Do you know why size and shape of shadows change? The size and shape of the shadow depends on the angle at which the light is falling on the object. 

 

Our shadow keeps changing in whole day. In the early morning  it will be the longest and, when the sun is overhead there is little or no shadow at all. Why? The position of sun changes throughout the day, thus changing the angle at which the rays fall on the ground.In ancient time people tracked the length of shadows throughout the day to keep track of time. The world’s earliest clock was a sun clock.

 

But one thing is amazing that the color of every opaque objects shadows are same, weather object is colorful or plane or have one color only. All have the same color of shadow that is dark (colorless).

Top amazing things in the world

There are tow  amazing things in nature.

(a) Light                  (b) Shadow (dark)

Lets start to know.....

Which type of mysteries and relations between light and shadow (dark) and with Us.

Before starting see this image and think.......a lot. what did you analyze ?

This images is saying many things about light and shadow (dark), you should think a lot in it.

Light and shadow combination