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Physics
Physics
Problem
Explain, in one or two sentences, why an expression of the form
E
(
x
,
t
)
=
E
0
sin
(
k
x
−
ω
t
+
ϕ
)
E(x,t)=E_0 \sin (kx-\omega t+\phi)
E
(
x
,
t
)
=
E
0
sin
(
k
x
−
ω
t
+
ϕ
)
represents a wave travelling along the +x-direction.
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