\(\frac{2q}{ε_{0}}\)
\(\frac{2q}{ε_{0}}\)4\(\pi\)r2
infinite
Zero
\(\frac{q}{ε_{0}}\)
The correct answer is (D):Zero
A point source of light is placed at the focus of a concave mirror. Consider only paraxial rays. The shapes of the wavefronts of incident and reflected lights respectively are:
An electric dipole is a pair of equal and opposite point charges -q and q, separated by a distance of 2a. The direction from q to -q is said to be the direction in space.
p=q×2a
where,
p denotes the electric dipole moment, pointing from the negative charge to the positive charge.