The expression for an electric field is changed from to while keeping unchanged
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
The expression for an electric field is changed from E(x,t)=E0sin(kx−ωt) to E(x,t)=E0sin(kx+ωt) while keeping ω/k unchanged. Which of the following is affected by this change?
(a) Both magnitude and direction of the phase speed
(b) Magnitude of the phase speed only
(c) Direction of propagation only
(d) Neither magnitude nor direction of the phase speed