Q. In earth's atmosphere, for $F_{2}$-layer, the virtual height and critical frequency in night time are
A) 210 km and 5 MHz
B) 250 km and 6 MHz
C) 280 km and 7 MHz
D) 350 km and 6 MHz
Explanation
(d) Virtual height of $F_{2}$-layer is 350 km and critical frequency is 6 MHz
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.