Ray Table for a total internal reflection and a critical Rayble 19. ens by the g

Question

Ray Table for a total internal reflection and a critical Rayble 19. ens by the glass lens and repeat steps 3 and 4. Record the le in Dea Table 193. disappears and only refleced ray is visble Resed tegeo the Ray table until refracted the acrylic cylindrical lens by the lReplace the glass lens by the lens filled by uneet ts ad sngle à in Data Table 19.3. steps 3 and 4. Record the angle in Dala Table 193. steps utations and Data Analysis of the graph? find the ash? Make conclusions about Law of Reflection 3 and 4. Recoed the incidence ion e. Using data from Data Table 19.1, plot a graph of & verus &. What is the slope averat ke conclusions Using data from Data Table 19.2 for the average angle of refraction and plo re 1. Find the average Rad the avea versus sin 0, for the acrylic plic measured value for the index of refraction with the standard value by computing the lens. Find the slope of the graph, which is the index of refraction n for the 2 ad 3 for the cylindrical glass lens. Repeat steps ion n for the acryl and glass using the data in Data Table 19.3 and eqation 4 Repeat steps ics course) Repeat steps 2 and 5 for the lens filled by unknown fuid. Find index of refraction mpare your value for the index of refraction obtained for the unknown fluid with the sin a (For an advanced for the unknown fluid. Com table values of the index of refraction for different fluids and identify the unkndwthe Questions 1 When you are looking through an aquarium at the fish, is the fish as close as it appears? Explain. in air is incident on a water surface at a 430 angle of incidence. Find the angle of reflection and the angle of . What is the critical angle for the light emerging from water into air? Explain why a diamond shows more "sparkle" than a glass crystal of the same shape and size 5. Is it possible to have total internal reflection for light incident from air on water? Explain. refraction. 131

Explanation / Answer

Question :

1)  When we look through an aquarium window at a fish, the fish appears to be closer than it actually is. When light from the fish leaves the water and enters the air, it is bent away from the normal Therefore, the apparent location of the image is closer to the observer than the actual location of the fish.

2) angle of reflection will be same as angle of incidence which is 43 degree.

For angle of refraction,

1(sin43° ) = (1.33)(sinx)

solve for x, we get 30.85 degree

3) The critical angle of light emerging from water into air is the angle where the refracted light follows the horizontal as it emerges from the water.

4) Because of their shape, the light is reflected multiple times due to total internal reflection which makes them sparkle more.

5)  Because it not possible to have total internal reflection when light travels from a medium of lower refractive index (air) to a medium of higher refractive index (water)

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