Electric field of point charge in environment
$$E_{apl} = \frac{k\cdot q_0}{\varepsilon\cdot r^{2}}$$
E - electric field
k - proportionality coefficient
q - charge
ε - dielectric constant (permittivity)
r - distance
k - proportionality coefficient
q - charge
ε - dielectric constant (permittivity)
r - distance
Find
It is known that:
= 