Q. In a phase electromagnetic wave, the electric filed oscillates sinusoidally at a frequency of $2.0 \times 10^{10}$ Hz and amplitude $48\ Vm^{- 1}$. The wavelength of the wave is
A) $24 \times 10^{- 10}\ m$
B) $1.5 \times 10^{- 2}\ m$
C) $4.16 \times 10^{8}\ m$
D) $3 \times 10^{8}\ m$
Explanation
(b) Wavelength, $\lambda = c/v = 3 \times 10^{8}/2 \times 10^{10} = 1.5 \times 10^{- 2}\ m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.