Question

Submission 1 (0/1 points) Wednesday, July 29, 2020 01:11 AM EDT A laser beam strikes one end of a slab of material, as in the figure below. The index of refraction of the slab is 1.50. Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab. (Enter an integer for the total number of complete reflections. Assume 0 - 47.86.) 23 x Your response differs from the correct answer by more than 10%. Double check your calculations, complete internal reflections 3.10 mm

Answer 1

From Snell law Solution Given ni = 1.5 (index sie fer action of slab n, sin 0 = n2 sin o, whesie, og = 47.89 1₂ = index of refraction of ain s 1: 0003 ng sin oi ne x sin@g) 1.0003 x sin(47.8) ni 1.5 sin (Oi) = 0.494 29.6 is the angle of O, refraction of beam just as it enters the slab:

a Th h 3.1 mm d d M k 42 cm 3 3. [X10 2 tan (0) = slo de tan (29.6) d = 2.7285x10 m -3 the opposite The number of internal Steflections made before reaching end of slab is length of slab Na 2d 42X10 2 2x 2.7285x10 Në 76 approximately).