0 votes 0 votes The phase velocity of waves propagating in a hollow metal waveguide is greater than the velocity of light in free space. less than the velocity of light in free space. equal to the velocity of light in free space. equal to the group velocity. Others gate2001-ec + – admin asked Sep 29, 2022 • edited Nov 30, 2023 by makhdoom ghaya admin 46.4k points 59 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.