Question

Which of the following types of waves can transmit only through matter? Select all that apply. (Hint: there are 2)
a) Seismic waves

b) Sound waves

c) Microwaves

d) Gamma rays

Answer 1

a) seismic waves
b) sound waves

sound waves are traveling vibrations of particles in media (air, water, metal, etc) so they can’t travel through empty space (vacuums) because there are no atoms or molecules to vibrate.

seismic waves are mechanical waves and require a medium for propagation, hence, they cannot travel through a vacuum.

hope this helps :)