A) 0.015 cm
B) 0.025 cm
C) 0.010 cm
D) 0.030 cm
Correct Answer: A
Solution :
\[\beta =\frac{6000\times {{10}^{-10}}\times 25\times {{10}^{-2}}}{{{10}^{-3}}}\] \[\therefore {{\lambda }_{glass}}<{{\lambda }_{air}}\ \ (\because \ {{C}_{glass}}<{{C}_{air}})\].
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