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RADIOACTIVITYWhat is radioactivity?
Radioactivity is defined as the spontaneous disintegration of certain atomic nuclei. This disintegration is accompanied by the emission of alpha particles, beta particles, and gamma radiation. Disintegration of naturally occurring radioisotopes is called natural radioactivity.
RADIOACTIVE RAYS
An experiment to study the effect of electric […]

PHOTON AND QUANTUM INTERPRETATION OF PHOTOELECTRIC EFFECT
Einstein took the planks idea of the quantum theory and proposed that a monochromatic electromagnetic wave of some frequency v consists of discrete quanta each having energy

E=hv

These quanta of light are referred to as photons. […]