Question

Define the following
(i) Wave Number
(ii) Photo electric effect
(iii) Planks's constant.​

Answer 1

Answer:

Wave Number:-

In the physical sciences, the wavenumber (also wave number or repetency) is the spatial frequency of a wave, measured in cycles per unit distance or radians per unit distance. Whereas temporal frequency can be thought of as the number of waves per unit time, wavenumber is the number of waves per unit distance.

Photo electric effect:-

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.

Plank's Constant:-

{Equation = 6.62607004 × 10-34 m2 kg / s}

Definition = Planck's constant, (symbol h), fundamental physical constant characteristic of the mathematical formulations of quantum mechanics, which describes the behaviour of particles and waves on the atomic scale, including the particle aspect of light.

Explanation:

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Answer 2

1. : the number of waves per unit distance of radiant energy of a given wavelength : the reciprocal of the wavelength
2. 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.
3. The Planck constant, or Planck's constant, is the quantum of electromagnetic action that relates a photon's energy to its frequency. The Planck constant multiplied by a photon's frequency is equal to a photon's energy.