Presentation on Branches of Physics & Radar

8/9/2019 Presentation on Branches of Physics & Radar

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Branches of Physics &Branches of Physics &

RadarRadar


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Glance At PresentationGlance At Presentation

Physics & its branches

Radar & its uses


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PhysicsPhysics

The word Physics comes from a greek wordPhysikos means natural.

Physics deals with the combination of matterand energy. It also deals with a wide varietyof systems about which theories have beendevelo!ed that are used by !hysicists.

The !hysicists have divided the sub"ect of

!hysics into various branches each branchhas ac#uired a title of a full sub"ectnowadays.


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Branches of PhysicsBranches of Physics

$echanics %lectricity

%lectromagnetism

olid tate Physics 'tomic Physics

(uclear Physics

Plasma Physics

)io Physics

'stro Physics


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MechanicsMechanics

$echanics science concerned with the motionof bodies under the action of forces includingthe s!ecial case in which a body remains at rest.

$echanics may be divided into three branches*

Statics which deals with forces acting on and ina body at rest.

Kinematics which describes the !ossiblemotions of a body or system of bodies+ and

Kinetics which attem!ts to e,!lain or !redictthe motion that will occur in a given situation.


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ElectricityElectricity

Electricityis the set of !hysical!henomena associated with the !resenceand -ow of electriccharge. Electricitygives a wide variety ofwellknown e/ects such as lightningstatic electricity electromagneticinduction and electrical current.


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ElectromagnetismElectromagnetism

It deals with observations !rinci!les laws& methods that relate electricity andmagnetism.


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Solid State PhysicsSolid State Physics

It is concerned with the structure and!ro!erties of solid state materials.


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Atomic PhysicsAtomic Physics

This is the branch of !hysics that studiesatoms and the structure of atoms. (uclear!ower !lants 0ray machines and thesmoke detectors in your home all e,istbecause of our understanding of atomic!hysics.


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Nuclear PhysicsNuclear Physics

(uclear !hysics is the 1eld of !hysics thatstudies the constituents and interactionsof atomic nuclei.

The most commonly known a!!lications ofnuclear !hysics are nuclear !owergeneration.


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Plasma PhysicsPlasma Physics

It is concerned with the !ro!erties ofhighly ioni2ed atoms forming a mi,ture ofbare nuclei 3nuclei without electrons4 andelectrons.


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Bio-PhysicsBio-Physics

This branch studies the !hysics of livingorganisms. It is sometimes considered tobe an overla! of biology and !hysics.

)io!hysics and medicine go hand in handas this study !lays a big !art in thedevelo!ment of lifesaving machines andarti1cial limbs.


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Astro PhysicsAstro Physics

This is the study of stars and gala,ies.'stro!hysics also involves abstractconce!ts such as !redictions about thebeginnings of the universe. 5ith a degreein astro!hysics you could design satellitesor even run missions into outer s!ace byworking at (''.


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RadarRadar

'cronym for Radio Detection and Ranging.

Radar is a remote sensing techniue*6a!able of gathering information about

ob"ects located at remote distances fromthe sensing device.

RADAR is a method of usingelectromagnetic waves to remotesense

the !osition velocity and identifyingcharacteristics of targets.


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!istory of Radar!istory of Radar

Radar was develo!ed for military !ur!osesduring 5. 5. II.

The )ritish and 7 $ilitary used radar to

locate shi!s and air!lanes.


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Radar Performance andRadar Performance and

"reuency Bands"reuency Bands )andwidthThe bandwidth determines the range resolution and fre#uency agility ca!abilities of the

radar.

'ntenna8or a given gain low fre#uency antennas are larger than high fre#uency. 9ow fre#uency are favored

for

longrange search a!!lications because of the larger e/ective area associated with a given gainallowing more e/ective ca!ture of echoes.

TransmitterIn general more radio fre#uency !ower can be !roduced at low fre#uency than at high.

ReceiverThere is no clear choice between high and low fre#uencies.

Pro!agationThe attenuation at high fre#uency is dramatic. ' given raindro! has over three orders of magnitude

more scattering cross section at 0band3:;


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#ses of Radar#ses of Radar

Nautical Radars$ it is used to locatelandmarks and other shi!s+ oceansurveillancesystems outer s!ace surveillance etc.

A%iation Radars$ 'ircrafts are e#ui!!ed with

radar devices that warn of obstacles in ora!!roaching their !ath and give accuratealtitude readings.

Marine Radars$They are used to measure the

bearing and distance of shi!s to !reventcollision with other shi!s to navigate and 1,their !ositions at sea.


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#ses of Radar 'ont()#ses of Radar 'ont()

*eather-sensing Radars$ It is an im!ortant tool inweather forecasting and hel!s make the forecasts moreaccurate

Detection and search Radar$ It is the ?early warningradar@ which is used for longrange detection of ob"ects

Missile Guidance Systems$This radar is used to locatethe target of missile often !resent in $ilitary aircraft

Radar for Biological Research$ )ird and Insect radarare used fre#uently by scientists to track the migration

!atterns of animals. Air tra+c control and na%igation Radar$This radar is

used by air!ort to ensure the safety of !lanes.


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Presentation on Branches of Physics & Radar

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