The refractive index n of a substance is a dimensionless measure of how much light bends (refracts) when passing from one medium to another. n = c v where c is the speed of light in a vacuum (a constant) and v is the speed of light in the medium. For example, the refractive index of diamond is 2.42 which means that light travels 2.42 times as fast in a vacuum as it does in a diamond. Snell's law is an equation that relates the indices of refraction of two different mediums to the angle of incidence θ 1 and angle of refraction θ 2 . Angles θ 1 and θ 2 are measured from a line perpendicular to the boundary between the two mediums. Use this relationship and the table of refraction indices to complete Exercises 93-94. n 1 s i n θ 1 , = n 2 sin θ 2 Assume that a beam of light travels from air into water. a. If the incidence angle θ 1 is 40 ∘ , what is the angle of refraction θ 2 ? Round to the nearest tenth of a degree. b. Alina attempts to spear a lobster from her boat, if she aims her spear directly at the lobster, will she hit it? Explain your answer.
The refractive index n of a substance is a dimensionless measure of how much light bends (refracts) when passing from one medium to another. n = c v where c is the speed of light in a vacuum (a constant) and v is the speed of light in the medium. For example, the refractive index of diamond is 2.42 which means that light travels 2.42 times as fast in a vacuum as it does in a diamond. Snell's law is an equation that relates the indices of refraction of two different mediums to the angle of incidence θ 1 and angle of refraction θ 2 . Angles θ 1 and θ 2 are measured from a line perpendicular to the boundary between the two mediums. Use this relationship and the table of refraction indices to complete Exercises 93-94. n 1 s i n θ 1 , = n 2 sin θ 2 Assume that a beam of light travels from air into water. a. If the incidence angle θ 1 is 40 ∘ , what is the angle of refraction θ 2 ? Round to the nearest tenth of a degree. b. Alina attempts to spear a lobster from her boat, if she aims her spear directly at the lobster, will she hit it? Explain your answer.
Solution Summary: The author explains Snell's law, which relates the indices of retion of two different mediums to the angle of incidence
The refractive index
n
of a substance is a dimensionless measure of how much light bends (refracts) when passing from one medium to another.
n
=
c
v
where
c
is the speed of light in a vacuum (a constant) and
v
is the speed of light in the medium. For example, the refractive index of diamond is 2.42 which means that light travels 2.42 times as fast in a vacuum as it does in a diamond.
Snell's law is an equation that relates the indices of refraction of two different mediums to the angle of incidence
θ
1
and angle of refraction
θ
2
. Angles
θ
1
and
θ
2
are measured from a line perpendicular to the boundary between the two mediums. Use this relationship and the table of refraction indices to complete Exercises 93-94.
n
1
s
i
n
θ
1
,
=
n
2
sin
θ
2
Assume that a beam of light travels from air into water.
a. If the incidence angle
θ
1
is
40
∘
, what is the angle of refraction
θ
2
? Round to the nearest tenth of a degree.
b. Alina attempts to spear a lobster from her boat, if she aims her spear directly at the lobster, will she hit it? Explain your answer.
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