1.

The time required to pass the light through a glass slab of 2 mm thick is (\[{{\mu }_{glass}}=1.5\]) [AFMC 1997; MH CET 2002, 04]

A.            \[{{10}^{-5}}\,s\]                
B.            \[{{10}^{-11}}\]\[s\]
C.            \[{{10}^{-9}}\]s                   
D.            \[{{10}^{-13}}\]\[s\]
Answer» C.            \[{{10}^{-9}}\]s                   


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