Planck's constant has the dimensions of :

Answer: Option C

Planck's constant, often denoted as "h," has the dimensions of angular momentum. It is a fundamental physical constant used in quantum mechanics to relate the energy of a photon to its frequency. Planck's constant is represented by the equation:

E=h⋅f

Where:
E represents energy,
h is Planck's constant,
f is the frequency of the photon.

The dimensions of Planck's constant (h) are the product of energy and time (ET), and it is often expressed in units like joule-seconds (J·s). Angular momentum also has the dimensions of energy multiplied by time (ET).