In the figure, two light pulses are sent through layers of plastic with thicknesses of either L or 2L as shown and indexes of refraction n = 1.58, n2 = 1.74, n3 = 1.62, n4 = 1.51, ng = 1.67, ne = 1.72, and n7 = 1.52. (a) Which pulse travels through the plastic in greater time? (b) What multiple of L/c gives the difference in the traversal times of the pulses?

A beam of light moves through a slab of glass as shown in the figure. The index of refraction of the glass is ng = 1.5. The index of refraction of air is na = 1. The incident angle of the light is \theta i = 44\deg . Part (a)  If the refraction angle of the light at the upper surface of the slab is \theta 1, express sin\theta 1 in terms of \theta i, na, and ng. Part (b)  The incident angle of the light on the lower surface of the slab is \theta 2. What is the relation between \theta 1 and \theta 2?  Part (c)  The refraction angle of the light on the lower surface of the slab is \theta f. Express sin(\theta f) in terms of \theta 2, na, and ng.

The figure below shows the path of a beam of light through several layers with different indices of refraction. (Assume n = 1.02.) e₁ n = 1.60 02 n = 1.40 n = 1.20 MA (a) If ₁ = 28.0°, what is the angle 2 of the emerging beam? o 1 (b) What is the smallest incident angle ₁ to have total internal reflection at the surface between the medium with n = 1.20 and the medium with Па = 1.02?

Two light beams are incident normal to one surface of a triangular prism with refractive index n = 1.4 surrounded by air. What is the value of the angle between the two emerging beams, shown as a in the figure? d a 90° d 45° O 70.4° 73.7° O 61.8° 60.0° O 65.8° ..... ......