The index of refraction of water is 1.33 and the index of refraction of crown glass is 1.52. Which statement about the speed of light in these materials is true? a) The speed of light is the same in water and crown glass. b) The speed of light in water is faster than the speed of light in crown glass. c) The speed of light in crown glass is faster than the speed of light in water. d) More information is needed to compare the speed of light in the materials.

A sheet of glass of thickness 1.2 mm has refractive index = 1.4. A laser beam is incident on its edge at an angle 75 °. Will this ray suffer total internal reflection from the flat surfaces of the glass sheet and be reflected inside (if so, write 1). If it will not have total internal reflection and pass through the glass surface write 0. normal side view of glass sheet

Consider a light ray that transitions from a material with a higher index of refraction to a material with a lower index of refraction. a) does this ray speed up or slow down  b) does it bend toward the normal line or away from the line? c) do you get internal reflection when index of refraction for the second material is larger than the index of refraction for the first material or when it is smaller?

In lab, students perform an experiment to test the hypothesis that "when light passes from one material to another the angles of incidence and refraction will be related by the equation n10₁ - = n202." Their experiment is shining a laser at different incidence angles from air (n = 1) into water (n = 1.33) and measuring the angles of refraction. Which prediction about what their data should look like is consistent with their hypothesis? On each graph the dashed line represents a line with a slope of 1. Owater (degrees) sin(Owater) sin(Owater) 90 80 70 60 40 30 20 10 0 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 0 90 10 20 30 40 50 60 70 80 90 Oair (degrees) 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 sin(Bair) 80 ● ● 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 sin(Bair)