A) 0.5 mm
B) 1.0 mm
C) 1.2 mm
D) 1.5 mm
Correct Answer: C
Solution :
\[\frac{{{\beta }_{1}}}{{{\beta }_{2}}}=\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}\]or \[\frac{1.0}{{{\beta }_{2}}}=\frac{5000}{6000}\]or \[{{\beta }_{2}}=\frac{6000}{5000}=1.2\ mm\].
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