Question: 42 of 66:
Anthony shines a beam of light on the surface of a solution of glycerol at a certain angle. If the angle of refraction is 38°, what is the angle of incidence? The index of refraction of glycerol is 1.47, while that of air is 1.00.
Select one of the options below as your answer:

A.
38°
B.
45°
C.
55°
D.
65°
E.
70°

Question

Question: 42 of 66:
Anthony shines a beam of light on the surface of a solution of glycerol at a certain angle. If the angle of refraction is 38°, what is the angle of incidence? The index of refraction of glycerol is 1.47, while that of air is 1.00.
Select one of the options below as your answer:

    A.
    38°
    B.
    45°
    C.
    55°
    D.
    65°
    E.
    70°

fifciol · Answer

|dw:1373371338239:dw|
$$\frac{ \sin \alpha }{ \sin \theta }=\frac{ n_{glycerol} }{ n_{air} }$$
so
$$\sin \alpha =1,47* \sin 38^{o} \rightarrow \alpha =65^{o}$$
Answer D