Question

The ratio of energy to frequency of electromagnetic radiation is called:

• A. Bohr's constant
• B. Rydberg's constant
• C. Plancks constant
• D. Ritz constant

Answer 1

Answer: (C)

Plancks constant

The Planck constant (denoted by h, also called Planck's constant) is a physical quantity. It is described as the proportionality constant between the energy (E) of a charged atomic oscillator in the wall of a black body, and the frequency of its associated electromagnetic wave. This relation between the energy and frequency is called the Planck relation: $E=hv$ or $h=\frac{E}{v}$.