Question

give the contribution of max planck and albert einstein in the current understanding of the particle nature of light.​

Answer 1

Answer:

Here is your answer

Explanation:

Einstein set the energy of each light quantum in modern notation as equal to hv, where h is Planck's constant and v is the frequency of the light. ... With Einstein's light quantum hypothesis, he explained the photoelectric effect in a way that the prevailing wave theory of light could not.

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Answer 2

Answer:

Max Planck assumed that energy is quantized and can only be emitted or absorbed in an integral multiple of a small unit of energy known as  quantum. Quantum energy  is proportional to the frequency of radiation. The proportionality constant h is a natural constant (Planck's constant).

Energy = $h \nu$

where, $h$ is the planck's constant,

and $\nu$ is the frequency of radiation.

In 1900, while studying blackbody radiation,  German physicist Max Planck wrote in his paper "On the Law of Energy Distribution  in  Normal Spectrum" that the energy carried by electromagnetic waves is a packet of energy. I suggested that it can only be released.

In 1905, Albert Einstein published a  hypothesis that light energy was transported in discrete quantized packets to explain experimental data on the photoelectric effect. Einstein theorized that the energy of each quantum of light is equal to the frequency of light multiplied by a constant called Planck's constant. Photons above the threshold frequency have the energy required  to emit a single electron, causing the observed effect. This was an important step in the development of quantum mechanics.

Equating given by Einstein for Photoelectric effect:

$K_{max}=h\nu - W$

where, $K_{max}$ is the maximum kinetic energy,

$h\nu$ is the energy of incident light,

$W$ is the work fuction of the metal on which light is incident.

Experimental prove of the photoelectric effect, proved once and for all the existence of particle nature of light.

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