Geometrical OpticsHard
Question
A thin prism of angle 15o made of glass of refrective inducx μ1 = 15 is combined with another prism of glass of refrective index μ2 = 1.75 The combination of the prism produces dispersion without deviation. The angle of the second prism should be
Options
A.5o
B.7o
C.10o
D.12o
Solution
For dispersion without deviation
δ1 + δ1 = 0
(μ1 - 1) A1 + (μ2 - 1)A2 = 0
A2 = -
Subsituting the given values, we get
-ve sign shows that two prism must be joined in opposition.
δ1 + δ1 = 0
(μ1 - 1) A1 + (μ2 - 1)A2 = 0
A2 = -
Subsituting the given values, we get
-ve sign shows that two prism must be joined in opposition.
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