Table of Contents
- 1 What incorrect prediction does classical physics make about the spectrum of emitted light?
- 2 Why the classical physics was not able to explain the photoelectric effect?
- 3 How does classical theory fails to explain this effect?
- 4 How does classical theory fail to explain the results of Compton’s experiment?
- 5 Which of the following phenomena is failed to explain by classical free electron theory?
- 6 What problems with classical physics led to the development of quantum mechanics?
- 7 Can classical physics explain the shape of the blackbody spectrum?
What incorrect prediction does classical physics make about the spectrum of emitted light?
Classical mechanics could not accurately predict the spectrum of radiation emitted by a heated body. In fact, it predicted that a hot body should radiate an infinite amount of energy.
Why the classical physics was not able 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.
Why does classical physics predict that atoms should collapse?
Classical physics predicts that accelerating charged particles should emit radiation. If this happened, the loss of energy should be accompanied by a spiraling of the electron into the atomic nucleus (akin to the fate of satellites that encounter the atmosphere in low Earth orbit.
Which phenomena lead to the failure of classical physics and origin of quantum physics?
The failure of Classical Physics was highlighted by black body radiation and photoelectric effect. Max Planck and Albert Einstein provided explanations of both phenomena based on quantum hypothesis and are thus considered founders of Quantum Physics.
How does classical theory fails to explain this effect?
Classical wave theory cannot explain the first 3 observations of photoelectric effect. Since energy of the wave is dependent on the square of its amplitude, the classical wave theory predicts that if sufficiently intense light is used, the electrons would absorb enough energy to escape.
How does classical theory fail to explain the results of Compton’s experiment?
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.
Did Einstein support quantum mechanics as being fundamental physics or did he think quantum mechanics was incomplete quizlet?
Did Einstein support quantum mechanics as being fundamental physics, or did he think quantum mechanics was incomplete? Einstein thought quantum mechanics is not fundamental but has underpinnings yet to be discovered.
What does Bohr’s correspondence principle say about quantum mechanics versus classical mechanics?
If quantum mechanics were to be applicable to macroscopic objects, there must be some limit in which quantum mechanics reduces to classical mechanics. Bohr’s correspondence principle demands that classical physics and quantum physics give the same answer when the systems become large.
Which of the following phenomena is failed to explain by classical free electron theory?
Explanation: Classical theory states that all free electrons will absorb energy. This theory cannot explain the photo electric effect.
What problems with classical physics led to the development of quantum mechanics?
The problems with classical physics led to the development of Quantum Mechanics and Special Relativity. Some of the problems leading to the development of Quantum Mechanics are listed here. Black Body Radiation:Classical physics predicted that hot objects would instantly radiate away all their heat into electromagnetic waves.
What are some of the problems with classical physics?
The Problems with Classical Physics. Electromagnetic waves like light are made up of particles we call photons. Einstein, based on Plank’s formula, hypothesized that the particles of light had energy proportional to their frequency. The new idea of Quantum Mechanics is that every particle’s probability…
How does quantum mechanics explain the atomic energy spectra?
It took a full understanding of Quantum Mechanics to explain the atomic energy spectra. Compton Scattering:When light was scattered off electrons, it behaved just like a particle but changes wave length in the scattering; more evidence for the particle nature of light and Plank’s postulate.
Can classical physics explain the shape of the blackbody spectrum?
So far, so good. But classical physics could not explain the shape of the blackbody spectrum. The electrons in a hot object can vibrate with a range of frequencies, ranging from very few vibrations per second to a huge number of vibrations per second. In fact, there is no limit to how great the frequency can be.