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Multiple choice
In the classical double-slit experiment with slit separation
d
d
d
and wavelength
λ
\lambda
λ
, a bright fringe (constructive interference) occurs at angle
θ
\theta
θ
when:
🔬 try it before you answer
d
sin
θ
=
(
m
+
1
/
2
)
λ
d\sin\theta = (m + 1/2)\lambda
d
sin
θ
=
(
m
+
1/2
)
λ
for integer
m
m
m
d
sin
θ
=
m
λ
d\sin\theta = m\lambda
d
sin
θ
=
mλ
for integer
m
m
m
(path difference equals a whole number of wavelengths)
d
sin
θ
=
m
λ
/
2
d\sin\theta = m\lambda/2
d
sin
θ
=
mλ
/2
for any integer
m
m
m
sin
θ
=
λ
/
d
\sin\theta = \lambda/d
sin
θ
=
λ
/
d
only, independent of any integer order
Check answer