Q. Electromagnetic Waves of frequencies higher than 9$\sqrt{2}$ MHz are found to be reflected by the ionosphere on a particular day at a place. The maximum electron density in the ionosphere is
A) $\sqrt{5}\ \times 10^{12}\ m^{- 3}$
B) $\sqrt{2}\ \times \ 10^{12}\ m^{- 3}$
C) $2\ \times 10^{12}\ m^{- 3}$
D) $5\ \times \ 10^{12}\ m^{- 3}$
Explanation
The correct answer is Option D: $5\ \times \ 10^{12}\ m^{- 3}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.