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There are many examples of what classical physics can not explain.
(By classical physics we mean that which has its theoretical foundations before about 1900.)
Quantum mechanics is absent from classical physics. Classical physics can not explain why atoms (positive nucleus attracted to surrounding electrons) is stable. Even the simplest atom, a hydrogen atom, would be unstable and the electron orbiting the proton would gradually radiate its energy and the orbit would decay.
The photoelectric effect is an important historical example of the failure of classical physics. In that case, electromagnetic theory said that light was an electromagnetic wave. That was true enough but it does not account for the quantum nature of light and the characteristics that allow a photon to act like a discrete bundle of electromagnetic energy with properties like a particle.
Virtually all of our understanding about the atomic structure and properties of matter depends on quantum mechanics, so the example of hydrogen is just symbolic of the need for modern physics for the entirety of our understanding about electronic properties of matter.
One can choose to define classical physics to include relativity or not as one wishes, but it is fair to say that Newtonian mechanics does not explain relativistic mechanics. In particular, time dilation and length contraction are purely relativistic effects.
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What are the reason the classical physics failed?
It is a macroscopic theory. Their theoretical values are not equal to the experimental values. The classical theory cannot explain the photoelectric effect,compton effect,magnetic properties briefly..... it obeys the classical mechanics. it does not briefly explain the atoms internal parts . hence it is rectified by quantum physics....!
Can classical physics explain the photoelectric effect?
No. To explain the photoelectric effect, you have to think of light as a particle, not a wave. The fact that light can be both a wave and a particle is part of quantum mechanics, not classical physics.
Who is the father is classical physics?
Sir Isaac newton is the undisputed father of classical physics.
What is the definition of classical physics?
Classical physics is the physics without considering quantum mechanics. This is the type of physics practiced by for example Newton (you might also come across the term Newtonian physics). General relativity is also a classical theory. The distinction is often used because quantum mechanics changed quite a bit in many fields of physics, so the term 'classical physics' allows for a clear distinction. The opposite of classical physics would be quantum physics.
Why classical physics changes from classical to quantum?
actually, classical physics can be formulated as an approximation of the laws of quantum theory, where the Planck constant tends to 0.
What are the reason the classical physics failed?
It is a macroscopic theory. Their theoretical values are not equal to the experimental values. The classical theory cannot explain the photoelectric effect,compton effect,magnetic properties briefly..... it obeys the classical mechanics. it does not briefly explain the atoms internal parts . hence it is rectified by quantum physics....!
Can classical physics explain the photoelectric effect?
No. To explain the photoelectric effect, you have to think of light as a particle, not a wave. The fact that light can be both a wave and a particle is part of quantum mechanics, not classical physics.
Why the classical theory of solids cannot explain the theory of solids?
please explain
Why you need quantum or modern physics while classical physics existed already?
Classical physics was based upon how the things we deal with every day move when we deal with them in everyday situations. As we started to discover new things (protons, electrons, redshift, etc) classical physics failed to completely explain what we observed. Modern physics explained time-and-space related quandries while quantum physics explained wave-and-particle dualities.
Who is the father is classical physics?
Sir Isaac newton is the undisputed father of classical physics.
What is the definition of classical physics?
Classical physics is the physics without considering quantum mechanics. This is the type of physics practiced by for example Newton (you might also come across the term Newtonian physics). General relativity is also a classical theory. The distinction is often used because quantum mechanics changed quite a bit in many fields of physics, so the term 'classical physics' allows for a clear distinction. The opposite of classical physics would be quantum physics.
What is radioactive decay in classical physics?
impossible & inexplicable. in classical physics radioactivity simply can't happen.
Father of modern and classical physics?
There isn't one father of physics, there were many important physicists through the ages, each redefining the concepts we know today. We can point to some of the more noticeable physicists, who are, perhaps - Aristotle, Galileo, Newton and Einstein. There are many sites and books which can explain exactly who these people are and what their input to physics was.
Why classical physics changes from classical to quantum?
actually, classical physics can be formulated as an approximation of the laws of quantum theory, where the Planck constant tends to 0.
What are the two major divisions of physics?
classical physics and (Quantum or modern) Physics
What are the subdivision of classical physics?
There are many different subdivisions of classical physics. These subdivisions can be categorized as dynamics, hydrodynamic, acoustics, optics, mechanics, statics, magnetism, thermodynamics, and electricity. Basically, classical physics is physics dealing with things we can see or touch.
Why does classical physics fail to explain the photoelectric effect?
You have to take into consideration quantum mechanics and the fact that electrons absorb and emit in packets of energy.
