wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Do all EM waves travel at same speed?

Open in App
Solution

yes

explanation:
The speed of an electromagnetic wave is given by the permittivity and permeability of the medium. In vacuum, this relationship is expressed in the following way: c=1ϵ0μ0√c=1ϵ0μ0, where ϵ0ϵ0 is the permittivity of free space in a vacuum, and μ0μ0 is the permeability of free space in a vacuum. These are constants of nature, and so the speed cc of the electromagnetic wave in vacuum is also a constant of nature. In a medium, the permittivity and permeability are different from their free space equivalents, and therefore cn=1ϵμ√cn=1ϵμ in the medium, where ϵϵ and μμ are the new permittivity and permeability of the medium, respectively.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Speed of sound tackle
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon