What is light for all

 Dual nature of Light  

(a) Particle   (b) Wave

Light has dual nature particle (photon) as well as wave.

 

What is Photon. Photon is define as, very very tiny (smallest) particle/packet of energy. The rest mass of photon is zero.
 

What is wave. Wave is define as, A wave can be described as a disturbance that travels through a medium from one location to another location.
 

 

Albert Einstein's photoelectric effect experiment proves that light can behave as a particle while 

 

Thomas Young's double-slit experiment shows that it also behaves as a wave.
 

Albert Einstein proved that in 1905, light could behave as a particle by showing that a beam of light could eject electrons from metal when a suitable radiation (invisible ray) fall on metal, This suggested that light consisted of photons that could eject electrons of similar frequency. Einstein's discovery altered the prevalent theory at the time, which held that light was only a wave.
 

And light has the wave nature also, it has proved earlier by Young in 1801. In his experiment, Young shone light between two parallel slits, causing the light waves to interfere with each other and form a patter of dark and light bands. If light was primarily a particle, it would have formed two parallel lines.
 

Quantum mechanics explains the duality of light by describing it as a wave-packet. A wave-packet refers to waves that may interact either as spatially localized, acting as particle, or interacting like waves. This means light photons can either act as a particle or wave, depending on the circumstances.

 

Making wave by rope

Making wave by water

Wave example

Electromagnetic wave

Electromagnetic wave

Wave details

Wave example

Electromagnetic wave

Electromagnetic wave

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).

Light and shadow

Relation between Light and Shadow(dark).

• Light and shadow both are form of energy.
• Both neither created nor destroyed.
• Basically both are colorless and shapeless.
• Science has some information about light, but no information about shadow.
• You cant break or catch the light as well as shadow both.
• You cant stop or turn both.
• Shadow always travels with light and obey only light's rules.
• Wheres shadow exits light must be there and vice versa.
• Light is soul of shadow. Without light shadow will die.
• Shadow is perfect dress of light 
• Lets see 

• 

  Light and shadow combination

  
  

  

  Lady in light and shadow mode

Amazing things in the nature.

 Light and Shadow (dark)

• Amazing things that, about light and Shadow (dark) are following.

• There are amazing relation in light and shadow (dark).

• Every things in nature has their shadows.

• Every things in nature has their own shadows because of light and dark relation.

• Every things in nature has their own shadows except light and shadow (dark).

• Both live together every where, every moments, wheres light exits no shadow there, wheres shadow lives no light there.

• Lets see by these images.

   

Light and shadow combination.

Sunlight with shadow.