Production of X-rays
It is an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light.Production of x-raysX-rays are produced when the electrons are s...
Elementary Particles
Elementary particles are those particles which are indivisible and not made up of other particles.
Proton and neutrons ---------> Made up of Quarks
Types of Particles
- On the Basis of Mass:
a. Light-mass Particles
b. Intermediate-mass Particles
c. Heavy-mass Particles - On the Basis of Charge:
a. Positive Charge Particles
b. Negative Charge Particles
c. Neutral Particles - On the Basis of Spin:
a. Fermians - Odd Integer multiple of 1/2
b. Bosons: Even integer multiple of 1/2 (or simply integers, 0,1,2, etc.) - On the Basis of Average Life Span:
a. Stable - Long Life
b. Unstable - Very Short Life
Interaction Forces:
a. Gravitational
b. Electromagnetic
c. Weak Nuclear Force (between leptons and hedrons)
d. Strong Nuclear Force (between quarks)
Anti-particles: Anti-particles are particles having all properties similar except any one property w.r.to the other particle.
eg:
| Properties | For Electron (e-) | For anti-particle of electron (e+) |
| Mass (S | m | m |
| Charge (Different) | -ve | +ve |
| Spin (Same) | s | s |
| Average Life Span (Same) | l | l |
Pair Production: The phenomena of conversion of energy into matter is called pair production. When energetic photon strikes the heavy nucleus, particles and it's corresponding anti-particles are produced.
