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PHYSICS CHAP2

QuestionAnswer
WHEN POSITRON AND ELECTRON ANIHILATE EACH OTHER WHAT IS PRODUCED/AND... 2 GAMMA PHOTONS PRODUCED ,
AND ARE SENSED BY DETECTOR LINED TO COMPUTERS. GRADUALLY AN IMAGE IS BUILT UP FROM DETECTOR SIGNALS OF WHERE THE POSITRON EMITTING NUCLEI ARE INSIDE .
POSITRON EMISSION TAKE PLACE WHEN.... A PROTON TURN INTO NEUTRON IN UNSTABLE NUCLEUS WITH TOO MANY PROTONS. THE POSITRON +1BETA IS A ANTIPARTICLE OF THE ELECTRON AND HAS A POSITIVE CHARGE.
WHAT CHARGE DOES NEUTRINO HAVE /SYMBOL... UNCHARGED IS EMITTED. (V) .
POSITRON EMITTING ISOTOPES ARE MANUFACTURED BY/FROM.... PLACING STABLE ISOTOPE IN LIQUID OR SOLID.
(MANU OF POSITRON EMMITING ISOTOPE) FROM IN THE PATH OF A BEAM OF PROTONS. SOME... OF THE NUCLEI IN SUBSTANCES ABSORB EXTRA PROTONS AND BECOME UNSTABLE POSITION EMITTERS.
ANTIMATTER WAS PREDICTED IN/BY ... 1928 BY ENGLISH PHYSICIST PAUL DIRAC , BEFORE THE POSITRON WAS DISCOVERED. MORE THAN 20 YEARS BEFORE EINSTEIN.
WHAT DOES E=MC^2 REPRESENT ... HAD SHOWN THAT THE MASS OF A PARTICLE INCREASED THE FASTER IT.RELATED THE ENERGY SUPPLIED – TO INCREASE THE MASS.
EINSTEIN SAID THAT/MASS/CORRESSPONDS... THE MASS OF A PARTICLE WHEN STATIONARY (M0) CORRESPONDS TO REST ENERGY (M0C^2) LOCKED UP MASS.
EINSTEIN SHOWED THAT REST ENERGY.... MUST BE INCLUDED IN CONSERVATION OF ENERGY.
DIRAC PREDICTED.... THE EXISTENCE OF ANTIMATTER PARTICLE (ANTIPARTICLES) THAT WOULD UNLOCK REST ENERGY,
WHENEVER A PARTICLE AND CORRESPONDING ANTIPARTICLE MEET ... AND ANNIHILATE EACH OTHER.
DIRAC THEORY OF ANTIPARTICLE PREDICTED THAT...FOR EACH TYPE OF PARTICLE THERE IS A ANTIPARTICLE THAT : ANNIHILATES THE PARTICLE AND ITSELF IF THEY MEET CONVERTING THEIR TOTAL MASS INTO PHOTONS. HAS EXACTLY THE SAME REST MASS AS THE PARTICLE. HAS EXACTLY OPP CHARGE TO THE PARTICLE IF THE PARTICLE HAS A CHARGE.
WHEN PARTICLE AND ANTIPARTICLE MEET AND ANIHILATE THE CONVERT ... THEIR TOTAL MASS INTO PHOTONS.
ANTIPARTICLE REST MASS IS ... SAME AS PARTICLE REST MASS.
DIRAC ALSO PREDICTED/OPP... THE OPPOSITE PROCESS PAIR PRODUCTION.
PAIR PRODUCTION IS ... A PHOTON WITH SUFFICIENT ENERGY COULD CHANGE INTO A PARTICLE – ANTIPARTICLE PAIR WHICH COULD SEPARATE.
PARTICLE AND ANTIPARTICLE COLLIDE WHAT IS CREATED ... PHOTON UP AND DOWN ARE CREATED. (ANNIHILATION ).
IN REVERSE TO ANIHILATION A PHOTON MAKES... PARTICLE AND ANTIPARTICLE IN PAIR PRODUCTION.
THE ENERGY OF A PARTICLE USUALLY EXPRESSED IN .... MILLIONS OF ELECTRON VOLTS (MEV) 1 MEV = 1.60 10^-13J.
ONE ELECTRON VOLT =... THE ENERGY TRANSFERRED WHEN AN ELECTRON IF MOVED THROUGH A P.D OF 1 VOLT. GIVEN THAT THE REST MASS OF A PARTICLE AND ANTI PARTICLE CAN BE CALCULATE USING E –MC^2.
REST MASS OF PARTICLE AND ANITIPART CAN BE CALCULATED USING ... E=MC^2
A PARTICLE AND CORRESPONDING PARTICLE MEET THERE MASS IS CONVERTED.... INTO RADIATION ENERY. 2 PHOTONS ARE PRODUCED IN THE PROCESS
WHY ARE 2 PHOTONS PRODUCED IN PROCESS OF ANIHILATION ... SINGLE PHOTON WOULD TAKE AWAY MOMENTUM WHICH ISN'T ALLOWED AS NO OUTSIDE FORCE ACTS.
WHY ISN;T A SINGLE AAPRTI ALLOWED TO TAKE AWAY MOMENTUM... NO OUTSIDE FORCE ACTS IN ANIHILATION
THE MINIMUM ENERGY OF A PHOTON IN ANIHILATION IS ... = HFMIN=E0.
MINIMUM ENERGY OF A PHOTON IN PAIR PRODUTION IS ... =HFMIN = 2E0, E0 (REST ENERGY).
Created by: ufuoma
 

 



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