We are surrounded by
energy in our everyday lives. From the sun that shines, to the alarm
clock that wakes you up, to the TV that you watch just before you go
to sleep – they are all objects that emit energy in some form or
the other. But it is vital to have a clear understanding of this
phenomena to understand its impact on our lives.
Energy emitted from
various sources, travel outwards in electromagnetic waves. This
includes Radio waves, microwaves, visible light, and x rays. The key
difference lies in the wavelength, which determines the strength of
the radiated energy. This is what proves that all electromagnetic
waves are a type of radiation, but not all types of radiation are
electromagnetic. Radiation is a general term used for particles of
energy self-propagating through a space. Electromagnetic waves on the
other hand are formed by the radiation energy being absorbed by
charged particles. EM(electromagnetic) waves is one of the important
ways that energy is transported in the world around us.
It was in the 19th
century, that physicists like Thomas Young, Michael Faraday and Henri
Becquerel changed our perceived reality. There was an unseen world
beyond what we saw. They found the connection between electricity and
magnetism and classified Light, microwaves, x-rays, and TV and radio
transmissions into forms of 'electromagnetic wave'.
But the fact is that in
today's world, radiation is associated with something bad. We think
of harmful and destructive rays. But the truth is that the discovery
of how radiation works, and various forms of electromagnetic waves
have gone a long way in helping mankind. We are now able to harness
its power and tame it for our use. The key lies in understanding
what types of radiations are bad for you an protect yourself from it.
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