Q. The velocity of electromagnetic waves in a dielectric medium of constant 4 is
A) $1.5 \times 10^{8}ms^{- 1}$
B) $3 \times 10^{8}ms^{- 1}$
C) $6 \times 10^{8}ms^{- 1}$
D) $12 \times 10^{8}ms^{- 1}$
Explanation
(a) $v = \frac{v_{c}}{\sqrt{k}} = \frac{3 \times 10^{8}}{\sqrt{4}} = 1.5 \times 10^{8}\ ms^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.