physics When monochromatic light passes through the interface between two unknow

Question

physics

When monochromatic light passes through the interface between two unknown materials at an angle theta where 0 degree le 9 le 90 degree, no changes in the direction of propagation of light are observed. What can be said about the two materials? The two materials have matching indexes of refraction. The second material through which light propagates has a lower index of refraction. The second material through which light propagates has a higher index of refraction. The two materials are identical. The same monochromatic light passes through the interface between two other unknown materials. This time the transmitted wave is observed to be farther from the normal to the interface than the incident wave. What can be said about these two materials and the light traveling through them? The second material through which the light propagates has a higher index of refraction. The second material through which the light propagates has a lower index of refraction. As the light passes into the second material, its speed increases. As the light passes into the second material, its speed decreases.

Explanation / Answer

Part A : option 1

Part B: option 2 and option 3

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