Question

In the formula $E = hf$ what does h stands for?

Answer 1

In order to solve this question, we should know that the given formula in terms of E is the expression for energy of photons. Here, we will discuss the given expression and its each letter’s representation and then will discuss the representation of letter h.

Complete step by step answer:
In Quantum mechanics, the energy of light or the energy of photons is calculated by the famous formula given by scientist Max Planck, who states that the energy of a photon is equal to the frequency of light and a constant which is known as Plank’s constant.
The formula is written as $E = hf$ which is given in the question.
Here, E stands for energy in a photon.
f stands for the frequency of light.
and h stands for Planck’s constant and This ‘h’ the Planck’s constant has a fixed value of about $h = 6.62 \times {10^{ - 34}}J\sec$ which has a unit of Joule seconds.
This Planck’s constant is the base of many mathematical formulas used in the study of Quantum mechanics like Momentum, Kinetic energy and many fundamental physical quantities have this Planck’s constant h in their expressions.
Hence, h stands for Planck’s constant and has a fixed magnitude of $h = 6.62 \times {10^{ - 34}}J\sec$

Note: It should be remembered that, The dimensions of h the Planck’s constant is $[M{L^2}{T^{ - 1}}]$ which is the same as that of angular momentum. Physicist Max Planck introduced the Planck’s constant and He is also known as one of the founders of Quantum mechanics, which deals with the study of behaviour of particles at subatomic levels.