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Physics
Physics
Problem
A light ray is represented by the unit vector
s
=
3
5
i
^
+
4
5
j
^
\mathbf{s}=\tfrac{3}{5}\,\hat{\mathbf{i}}+\tfrac{4}{5}\,\hat{\mathbf{j}}
s
=
5
3
i
^
+
5
4
j
^
. It strikes a plane mirror whose unit normal is
n
^
=
k
^
\hat{\mathbf{n}}=\hat{\mathbf{k}}
n
^
=
k
^
. Calculate the angle of incidence.
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