|Class 11 Chemistry Structure of Atom||Planck’s quantum theory|
Planck’s quantum theory:
According to this theory:
E=nhv (where n is an integral multiple)
This formula can also be written as:
E = (nhc)/ (λ)
(Because we know frequency=speed of light/wavelength)
V = (c/ λ)
EXPLANATION OF BLACK BODY AND PHOTOELECTRIC EFFECT ON THE BASIS OF QUANTUM THEORY.
For the ejection, minimum frequency is required called threshold frequency .Let’s say light that falls, has energy equal to hv .Out of this h , a amount of h is used as binding energy and rest is given to electron as kinetic energy.
Following observations were made
Please note hvo is called as wave function.
Black body radiation
When light falls on the surface, the particles gain energy and starts oscillating. When more energy is supplied the oscillations increase, amplitude increase .Therefore, the colours keep on changing.