A 5.0-cm-thick layer of oil (n = 1.46) is sandwiched between a 1.0-cm-thick sheet of glass and a 2.3-cm-thick sheet of polystyrene plastic (n = 1.59). Part A How long (in ns) does it take...
a) 1.0 × 10⁻¹⁰ ns
b) 2.5 × 10⁻¹⁰ ns
c) 5.0 × 10⁻¹⁰ ns
d) 3.5 × 10⁻¹⁰ ns