Question

Pulse -LaeLzelzely •8 In Fig. 35-33, two light pulses are sent through layers of plastic I ni na ng n4 with thicknesses of either L or 2L as shown and indexes of refraction Pulse ni = 1.55, n2 = 1.70, n3 = 1.60, n4 = п5 Tп6 1.45, n5 = 1.59, no = 1.65, and ny = 1.50. (a) Which pulse travels IS Figure 35-33 Problem 8. Figure through the plastic in less time? (b) What multiple of Llc gives the difference in the traversal times of the pulses? n7

Answer 1

The index of refreaction through, speed of light in vacuum(c) speed of light in the medium (v) The speed of light in the medium is, v= The light travel sometime t, then an C For pulse one 1 =£(2n, +ng+n) = (2(1.59)+ 1.65 +1.50) For pulse two tz = =(n +na+ng+na) 3(1.55+1.70+1.60+1.45) (6) Two pulses travelled through in less time, the time difference is, At = t; -t ==(6.33-6.3) = 0.03