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Q#1
Plane Waves
GATE EC 2023
MCQ
+1 mark
-0.33 marks
Consider a narrow band signal, propagating in a lossless dielectric medium 
, with phase velocity 
and group velocity 
. Which of the following statement is true?
(
is the velocity of light in vacuum.)
Explanation:
- Phase velocity,
- Group velocity,
Here, 
Hence, 
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