A short light pulse enters a -thick slab of acrylic ( ) from air and exits the far side

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

A short light pulse enters a 2.0 cm2.0\,\text{cm}-thick slab of acrylic (n=1.49n = 1.49) from air and exits the far side. Approximately how much later does the pulse leave the acrylic slab than it would have taken to travel the same distance in vacuum? (a) 6.7 ps6.7\,\text{ps} (b) 99 ps99\,\text{ps} (c) 33 ps33\,\text{ps} (d) 3.3 ps3.3\,\text{ps}

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