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Physics
Physics
Problem
For the plane wave
E
(
x
,
t
)
=
E
0
sin
(
k
x
−
ω
t
)
E(x,t)=E_0\sin(kx-\omega t)
E
(
x
,
t
)
=
E
0
sin
(
k
x
−
ω
t
)
observed at the same instant
t
t
t
, the phase difference
Δ
ϕ
\Delta \phi
Δ
ϕ
between two points separated by a distance
Δ
x
\Delta x
Δ
x
is a)
k
Δ
x
2
\dfrac{k\,\Delta x}{2}
2
k
Δ
x
b)
Δ
x
λ
\dfrac{\Delta x}{\lambda}
λ
Δ
x
c)
k
Δ
x
k\,\Delta x
k
Δ
x
d)
2
k
Δ
x
2k\,\Delta x
2
k
Δ
x
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