Hi guys does anyone know the difference in phase velocity and group velocity?
Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!
Usually a wave has its own phase(angle)
the rate of change of that phase when wave is propagated is PHASE VELOCITY
GROUP VELOCITY of a wave is the velocity with which the overall shape of the wave's amplitudes propagates through space
in attachment u could see it clearly...
RED DOT SHOWS PHASE VELOCITY
GREEN DOT SHOWS THE GROUP VELOCITY
Not the answer you are looking for? Search for more explanations.
Phase velocity is actual velocity of an unmodulated wave
Group velocity comes into scene when the wave(msg signal) is modulated with another wave(carrier signal) of higher freq....
consider the amplitude modulated wave(in attachment), the high frequency wave forms the envelope of the low frequency wave........
here the velocity determined with respect to envelope is phase velocity
similarly the velocity of the carrier signal in modulated wave is group velocity
Phase velocity refers to the the velocity of individual de-Broglie wave. It is always more than the velocity of light.
Group velocity is the velocity of the group of waves ie wave packet is called group velocity & its velocity is equal to the velocity of material particle with which the wave packet is associated.
The phase velocity of a wave is the rate at which the phase of the wave propagates in space. This is the speed at which the phase of any one frequency component of the wave travels. For such a component, any given phase of the wave (for example, the crest) will appear to travel at the phase velocity.
The group velocity of the wave is the rate that changes in amplitude (the envelope of the wave) will propagate.
In a dispersive medium, the phase velocity varies with frequency and is not necessarily the same as the group velocity of the wave.