Light incident perpendicular

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A 4.1 cm -thick layer of oil is sandwiched between a 2.0 cm -thick sheet of glass and a 2.5 cm -thick sheet of polystyrene plastic. How long (in ns) does it take light incident perpendicular to the glass to pass through this 8.6 cm -thick sandwich?

Reference no: EM131059935

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Light incident perpendicular : A 4.1 cm -thick layer of oil is sandwiched between a 2.0 cm -thick sheet of glass and a 2.5 cm -thick sheet of polystyrene plastic. How long (in ns) does it take light incident perpendicular to the glass to pass through this 8.6 cm -thick sandwich..
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