Table of Contents
- 1 Why did classical physics fail to explain Compton effect?
- 2 Why did classical physics fails to explain the photoelectric effect?
- 3 Which of the following phenomenon classical mechanics fails to explain?
- 4 Why is Planck’s constant so important to modern physics?
- 5 What happens if the energy of photon is less than work function?
Why did classical physics fail to explain Compton effect?
It means scattered beam of X-ray and incident beam of X-ray should have same frequency and same wavelength but spectrum of results of Compton Effect shows that scattered beam has intensity peak at two wavelengths . Therefore classical wave theory fails to explain experimental results of Compton effects.
Why did classical physics fails to explain the photoelectric effect?
The photoelectric effect has three important characteristics that cannot be explained by classical physics: (1) the absence of a lag time, (2) the independence of the kinetic energy of photoelectrons on the intensity of incident radiation, and (3) the presence of a cut-off frequency.
Can classical physics explain the Compton effect?
Compton effect is important because it cannot be explained by classical mechanics and shows that it is a particle effect.
Can classical physics explain the photoelectric effect?
Classical physics was unable to explain the photoelectric effect. If classical physics applied to this situation, the electron in the metal could eventually collect enough energy to be ejected from the surface even if the incoming light was of low frequency.
Which of the following phenomenon classical mechanics fails to explain?
Classical mechanics or Newtonian mechanics failed to explain the phenomenon like black body radiation, photoelectric effect, the temperature dependence of heat capacity of the substance.
Why is Planck’s constant so important to modern physics?
If you look at most of the “equations” above, you will find Planck’s constant, h. This is the trademark of “modern physics.”. The failure of classical physics to explain blackbody radiation, the photoelectric effect, and the hydrogen atom ultimately demolished the foundations of classical physics.
Why don’t photons eject electrons when they shine?
If you go deeper and look how photoelectric effect works, you’ll find that each individual photon is responsible for ejecting an electron. Shining a light which has an awful lot of energy (high intensity; lot of photons) but with each photon having very little energy, it won’t eject any electron.
How did Einstein contribute to the understanding of the photoelectric effect?
Thus Einstein was able to provide a completely satisfactory picture of the photoelectric effect by using the concept of the quantum nature of light. In fact, the dual nature of light is brilliantly reflected by the very assumption Einstein made about the energy of a photon.
What happens if the energy of photon is less than work function?
The above formula shows that if the energy of the incident photon is less than the work function, the electrons cannot be separated from the surface of the metal and therefore will not be emitted.