Q. The highest frequency of radiowaves which when sent at some angle towards the ionosphere, gets reflected from that and returns to the earth is called
A) Critical frequency
B) Maximum unusable frequency
C) Polarisation of waves
D) None of the above
Explanation
(b) The highest frequency of radiowaves that can be reflected by the ionosphere is called maximum usable frequency
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.