Question

Mention the difference between electromagnetic wave theory planks quantum theory

Answer 1

ElectroMagnetic  theory --> Clark Maxwell gave this theory.---> Light travels in the form of waves of very small wave length.--->The colour of light depends upon its wavelength.--->Energy is neither emitted or absorbed by a body constantly.--->Energy of radiation is directly proportional to intensity of radiation.Limitations:--> This theory failed to explain black body radiation.Plank's Quantum of Radiation :---> Max Plank has given this theory.--->Radiation has energy.---> Radiant energy is neither emitted nor absorbed continuously but discontinuously in the form of small packets called as photons.---> Energy of photon is related to the frequency of radiation VE=hvwhere h is Planck's constant whose value is 6.6.3 x 10⁻³⁴ joules /sec---> whenever body emits or absorbs energy, it does in the whole number multiple of photons.E=nhvwhere n=1,2,3,4 etc.