does it have any application?
The effect has found use in electronic devices specialized for light detection and precisely timed electron emission.
Photoelectric effect
 The effect has found use in electronic devices specialized for light detection and precisely timed electron emission.

In classical electromagnetic theory, the photoelectric effect would be attributed to the transfer of energy from the continuous light waves to an electron. An alteration in the intensity of light would change the kinetic energy of the emitted electrons, and sufficiently dim light would result in the emission delayed by the time it would take the electrons to accumulate enough energy to leave the material. The experimental results, however, disagree with both predictions. Instead, they show that electrons are dislodged only when the light exceeds a threshold frequency. Below that threshold, no electrons are emitted from the material, regardless of the light intensity or the length of time of exposure to the light. Because a low-frequency beam at a high intensity could not build up the energy required to produce photoelectrons like it would have if light's energy was co
who is the scientist after whom einsteinium is named Albert Einstein. when was he born? 14 March 1879. where did he study? Catholic elementary school in Munich, Luitpold Gymnasium in Pavia. has he published any paper related to science? He published "Conclusions from the Capillarity Phenomena", "A New Determination of Molecular Dimensions" also on  photoelectric effect, Brownian motion, special relativity, and the equivalence of mass and energy. did he like music? Yes, He discovered the violin sonatas of Mozart and studied music. did he win any award? Yes, Nobel Prize in Physics, Alfred Nobel to name a few. which of his works earned him this? For his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect. what does the last mentioned  term mean? The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material.
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Photoelectric effect [SEP] Introduction
The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material. Electrons emitted in this manner are called photoelectrons. The phenomenon is studied in condensed matter physics, and solid state and quantum chemistry to draw inferences about the properties of atoms, molecules and solids. The effect has found use in electronic devices specialized for light detection and precisely timed electron emission. In classical electromagnetic theory, the photoelectric effect would be attributed to the transfer of energy from the continuous light waves to an electron. An alteration in the intensity of light would change the kinetic energy of the emitted electrons, and sufficiently dim light would result in the emission delayed by the time it would take the electrons to accumulate enough energy to leave the material.