Electromagnetism : Electromagnetic Wave

All we know about electromagnetism is a coil wired around a nail and supply with battery and suddenly an invisible force appear with north pole and south pole. Well we just know about it in small scale. But if we know about more on electromagnetism, we should know about electromagnetic wave. Wait!!! what is electromagnetic wave? If you want to know, well you are in the right place to learn it. 

Electromagnetic wave is made of magnetic field and electric field that oscillate in perpendicular direction. For example as we mention about coil with nail, IF we coil a wire around the nail and supply current with battery, the current will flows through the coil and create electric field and that will turn into magnetic field. Now using the same concept of coiled nail and we going to coil the nail closely apart and coil another nail further apart.

You will observe the nail closely coil have strong magnetic field than the coil nail with further apart. The same thing goes to the electromagnetic wave. the stronger the electromagnetic wave, the dangerous it is. 

Why electromagnetic wave is dangerous when it get strong?

As the picture above shown is a electromagnetic spectrum. When you see the picture the weaker electromagnetic wave is Radio wave,Micro wave,Infrared and visible light. This weak electromagnetic wave isn't harmful to human, this is called 'Non Ionizing Radiation'

After visible light, there's ultra violet,X-ray and gamma ray are the strongest electromagnetic wave. This wave will harmful for human.This is called 'Ionizing Radiation' These wave penetrate human DNA and make human mutant.

Although this electromagnetic waves have the weakest and strongest,but it's has advantage and disadvantage. Lets look at it.

Radio wave 

Radio wave is used in broadcast radio communication by hand phone,wakkie talkie and stream live television channels.

Advantage : Able to communicate and share information

Disadvantage : Need certain frequency to get radio signals

Microwave

Micro wave is used to communicate with satellite in space and also used for international live broadcast television streaming. Don't forget about your home micro wave oven. It emmit micro wave to heat up your food.

Advantage : Able to communicate in space and navigate GPS (Global Positioning System)

Disadvantage : Easily distortion by charge particles in atmosphere.

Infrared 

Able to send and receive information in short distance. Infrared also used for to see body thermal temperature as heat release by human body.

Advantage : Able to get information. Easy to see at night using infrared googles

Disadvantage : Can damaged human skin if expose long time.

Ultra violet 

Ultra violet is used for to detect fingerprints, fake money, and scan hologram on credit cards

Advantage : Able to scan and detect materials and Information of identity 

Disadvantage : Harmful for human skin and permanent blind.

X-Ray

X-ray used in medical facilities to scan bone damages and also can in airport for security inspection.

Advantage : Able to detect bone damages and scan material in bag luggage.

Disadvantage: Harmful for human and radioactive.

Gamma Ray  

Gamma ray is so dangerous. But it helps to destroy cancer cell in medical facilities. Gamma ray comes with three types. Alpha ray, Beta ray and Gamma ray. These rays destroy human living cell and make DNA gen mutant. Not become like Hulk.

Advantage : destroy cancer cell.

Disadvantage : Mutant DNA gen.

ELECTROMAGNETIC WAVE ARE EVERYWHERE BUT IT NOT HARMFUL FOR YOU UNLESS YOU GET HIT BY GAMMA RAYS AND DON'T THINK BECOME LIKE HULK.