I need expert help to solve the following question given below:
Question: A 3.7cm -thick layer of oil is sandwiched between a 1.0cm -thick sheet of glass and a 2.3cm -thick sheet of polystyrene plastic.
Part I: How long (in ns) does it take light incident perpendicular to the glass to pass through this 7.0cm -thick sandwich?
I need tutor help to solve the above question and express your answer to two significant figures and include the appropriate units. Thanks.