# Question edbbc

Apr 11, 2016

CGS Unit of Planck's Constant $h$ is
$\text{erg} \cdot s$

#### Explanation:

Planck's Constant $h$ is a physical constant.

It has a value of $6.6261 \times {10}^{-} 27 c {m}^{2} g m {s}^{-} 1$ in CGS units and 6.6261 × 10^-34 m^2 kg s^-1# in SI units.

As your question is in CGS system of units, we will use these only.

The famous equation $E = h \times \nu$
Where $E$ is the energy of a quantum of light.
$\nu$ is its frequency.
Lets us write units of all the known quantities
Unit of Energy is: erg
Unit of frequency is: Hz or ${s}^{-} 1$
$E = h \times \nu$
$\text{erg"="unit of } h \times {s}^{-} 1$, solving for 'unit of $h$'

$\text{unit of "h="erg"/s^-1="erg} \cdot s$
-.-.-.-.-.-.-.-.-.-.-.-.-.