It is often necessary to change the physical direction of propagation or the wave's polarization in waveguides. What is the purpose of a twist section?
A. To produce shunting reactance across the guide
B. To change the plane of polarization of the wave
C. To change the physical direction of propagation
D. So low received power does no damage to the powerful transmitter output
Question 2
Why is a waveguide often pressurized with nitrogen?
A. To prevent contamination
B. To change the plane of polarization of the wave
C. To attach or weld a metal plate at the end of the waveguide
D. To prevent reflections
Physical examination of the thyroid gland.
Examples of Minor Physical Abnormalities Associated with Schizophrenia
Geopolitical Change of 20th-Century Europe
Tidal and wave power
Electromagnetic wave
(left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur