Question

What did Einstein say about the photoelectric effect?

Answer 1

1. Wilhelm Ludwig Franz Hallwachs first proposed the photoelectric effect in 1887, and Heinrich Rudolf Hertz carried out the experimental verification.
2. They discovered that when a surface is subjected to higher-frequency electromagnetic radiation, the energy is absorbed and electrons are released.
3. Albert Einstein was successful in explaining the photoelectric effect after years of continuous research in this field.
4. He deduced that the effect was caused by light energy being carried in discrete quantized packets.
5. In 1921, he was awarded the Nobel Prize for his work.
6. According to Einstein, the photoelectric effect is the process that involves the ejection or release of electrons from the surface of materials (generally a metal) when light falls on them.
7. The photoelectric effect is an important concept that enables us to clearly understand the quantum nature of light and electrons.
   According to Einstein, the photoelectric effect each photon of energy (E) is, $E=h\nu$

Where, $E=$Energy of a photon in joule

$h=$planks constant (6.626 × 10^-34 J.s)

$\nu =$ frequency of photon in Hz