Which of the following statements is not true with respect to microwaves?
A. Electromagnetic waves with frequencies from 300 GHz to 400 THz.
B. Propagation is line-of-sight.
C. Very high-frequency waves cannot penetrate walls.
D. Use of certain portions of the band requires permission from authorities.
Answer:A
Which of the following statements is not true with respect to microwaves?
A. Electromagnetic waves with frequencies from 300 GHz to 400 THz. B. Propagation is line-of-sight. C. Very high-frequency waves cannot penetrate walls. D. Use of certain portions of the band requires permission from authorities.