1.

Light of wavelength is \[7200\,{AA}\] in air. It  has a wavelength in glass (\[\mu =1.5\]) equal to                                                     [DCE 1999]

A. \[7200\,\,{AA}\]               
B. \[4800\,\,{AA}\]
C. \[10800\,\,{AA}\]             
D. \[7201.5\,\,{AA}\]
Answer» C. \[10800\,\,{AA}\]             


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