Content Introduction Microwaves Properties Different kinds of Microwaves

Reflection

Diffraction

Interference

Stationary wave Application

What are Microwaves ?

electromagnetic waves wavelenght between 1mm and 10mm generated by klystron valves in the lab detected by a special receiver

Properties of Microwves

use a microwave transmitter can pass through a thick book can not pass throug metal sheets can be reflected by a sheet of aluminium an

d focused by a concave aluminum dishes diffraction accurs when passing through a g

ap between two aluminium plates

a little of the energy is absorbed and reflected on the way through

rain absob some microwave energy all materials getting warmer when absorb

some of the microwave energy

Reflection of microwave

Diffraction of microwave

Interferemce of microwave

Stationary microwave

Reflection , absorption and transmission of microwave

( the no . means energy)

Uses of Microwaves

Intercity telephone links microwave beam is used carry telephone

conversation between cities beam can carry more conversation than wire

Satellite links microwave beam carry television pictures

aimed at a satellite postion between two contients satellite receives and amplifies the beam before it ba

ck to receive aerials on the ground

Cooking microwaves are used to in special ovens cook food ri

ght through very rapidly can cook our brain and interal organ if we got in thei

r way

The End References :

Physics Alive

Phyics Examinations Course

Physics Beyond 2000