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An air-filled rectangular waveguide has dimensions 8cm x 10cm . The group velocity is | |
A. | 1.8 x 108 m/s [Wrong Answer] |
B. | 2.6 x 108 m/s [Correct Answer] |
C. | 3 x 108 m/s [Wrong Answer] |
D. | 0.3 x 108 m/s [Wrong Answer] |