Q. Which one of the following statements is wrong?
A) Radio waves in the frequency range 30 MHz to 60 MHz are called sky waves
B) Radio horizon of the transmitting antenna for space wave is $d_{T} = \sqrt{\left( 2Rh_{T} \right)}$
$(R = radius\ of\ earth,\ h_{T} = height\ of\ transmitting\ antenna)$
C) Within the skip distance neither the ground waves nor the sky waves are received
D) The principle of fibre optical communication is total internal reflection
Explanation
The correct answer is Option C: Within the skip distance neither the ground waves nor the sky waves are received.
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.