Microwave Communication
A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be

A reduction in horizontal resolution
No noticeable effect
A decrease in gain
A decrease in range

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Microwave Communication
As the electron beam moves through a klystron’s intercavity drift space

Phase modulation at the input cavity creates velocity modulation at the output cavity.
Frequency modulation at the input cavity creates velocity modulation at the output cavity
Density modulation at the input cavity creates velocity modulation at the output cavity
Velocity modulation at the input cavity creates density modulation at the output cavity

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