Huygens wave theory is used

Options

A. are transverse waves and require a medium to travel.
B. are longitudinal waves and require a medium to travel.
C. are transverse waves and require no medium to travel.
D. are longitudinal waves and require no medium to travel.

Answer

B

Explanation

According to Huygens, light waves are longitudinal waves and require a material medium to travel. For this reason Huygens assumed the existence of a hypothetical medium called luminiferous ether.