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25. I Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 11.5 cm from their point of intersection, as shown in Figure 23.47. For what angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0 cm long) after reflecting from the first mirror? [39.4°] 35. I A light ray passes through a rectangular slab of transparent material having index of refraction n = 2, as shown in Figure 23.50. The incident angle is ?0 = 60.0°. Determine (a) ?a, (b) ?b, and (c) ?c. (d) What is the relationship between the directions of the incident ray and the emerging ray? [(a) 25.7° (b) 25.7° (c) 60.0° (d) the emerging ray is parallel to the incident ray]

          25. I Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 11.5 cm from their point of intersection, as shown in Figure 23.47. For what angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0 cm long) after reflecting from the first mirror?
[39.4°]

35. I A light ray passes through a rectangular slab of transparent material having index of refraction n = 2, as shown in Figure 23.50. The incident angle is ?0 = 60.0°. Determine (a) ?a, (b) ?b, and (c) ?c. (d) What is the relationship between the directions of the incident ray and the emerging ray?

[(a) 25.7° (b) 25.7° (c) 60.0° (d) the emerging ray is parallel to the incident ray]

$25. I Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 11.5 cm from their point of intersection, as shown in Figure 23.47. For what angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0 cm long) after reflecting from the first mirror? [39.4°] 35. I A light ray passes through a rectangular slab of transparent material having index of refraction n = 2, as shown in Figure 23.50. The incident angle is ?0 = 60.0°. Determine (a) ?a, (b) ?b, and (c) ?c. (d) What is the relationship between the directions of the incident ray and the emerging ray? [(a) 25.7° (b) 25.7° (c) 60.0° (d) the emerging ray is parallel to the incident ray]$

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