Q. 13 The modes in a rectangular waveguide are denoted by 
where
m and n are the eigen numbers along the larger and smaller dimensions of the waveguide respectively. Which one of the following statements is TRUE?
(A) The 
mode of the wave does not exist
(B) The 
mode of the wave does not exist
(C) The and the modes both exist and have the same cut-off frequencies
(D) The and 
modes both exist and have the same cut-off
frequencies
Answer: A
Explanation:
