How does it take for light incident perpendicular to glass

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A 5.00 cm thick layer of oil is sandwiched between 1.00 cm thick sheet of glass and a 2.00 cm thick sheet of polystyrene plastic. How long (in nano-seconds) does it take for light incident perpendicular to the glass to pass through this 8.00 cm thick sandwich?

Reference no: EM13267888

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How does it take for light incident perpendicular to glass : A 5.00 cm thick layer of oil is sandwiched between 1.00 cm thick sheet of glass and a 2.00 cm thick sheet of polystyrene plastic. How long (in nano-seconds) does it take for light incident perpendicular to the glass to pass through this 8.00 cm th..
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