Tag: Physics
-
4 Types of Radiation & How they interact with Matter
We have four key types of radiation, namely: alpha, beta, gamma and neutron. The four types differ in mass, energy and how deep they penetrate objects. Alpha Particle The alpha particle (α) is a helium nucleus produced from the radioactive decay of heavy metals and some nuclear reactions. Alpha decay often occurs among nuclei that…
-
Electromagnetism and Its Applications
What is Magnetism? Magnetism is the force exerted by magnets when they attract or repel each other. This magnetism force is caused by the motion of electric charges. Every element or substance is made up of tiny units called atoms. Each atom has electrons (particles that carry electric charges). The electron spins around the nucleus…
-
Microwave Tubes
It was discovered in 1939 that a toroidal cavity made of conductive material called a cavity resonator surrounding an electron beam of oscillating intensity could extract power from the beam without intercepting the beam itself. The oscillating electric and magnetic fields associated with the beam ‘’echoed’’ inside the cavity, in a manner similar to the…