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As their name itself suggests these are the EMRs which are visible to our eyes in different
colours. These ranges between 700nm to 400nm. Most of the remote sensing systems and camera

records images in this range.

Ultraviolet (UV) Radiations
These radiations have wavelength shorter violet colour of visible light and longer than X-rays.
UV radiations can be divided into near UV (400—200nm), far UV (200-10) and extreme UV 1-

31 nm.

X-rays
These are very short length electromagnetic radiations wavelength in the approximate range from
0.01 to 10 nanometers. In EMS these falls between UV radiations and Gamma-rays. Mostly used

in medical sciences.

Gamma-rays
Gamma-rays are the electromagnetic radiations with shortest wavelength in the range of the range

of 105-11 m to 104-14 m. Their very high energy can cause serious damage to living cells.

8 (Components of GIS ( 5 ComponentsX 2 =10 MARKS) .a)
Geographic Information System Five Components.

Hardware:
Software:
Data:
People:
Methods:

1.)Hardware:

Hardware is Computer on which GIS software runs. Nowadays there are a different range of
computer, it might be Desktop or server based. ArcGIS Server is server based computer where GIS
software runs on network computer or cloud based. For computer to perform well all hardware
component must have high capacity. Some of the hardware components are: Motherboard, Hard
driver, processor, graphics card, printer and so on. These all component function together to run a
GIS software smoothly.