An air bubble in sphere having 4 cm diameter appears 1 cm from surface nearest to eye when looked along diameter. If aμg =1.5, the distance of bubble from refracting surface is
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a
1.2 cm
b
3.2 cm
c
2.8 cm
d
1.6 cm
answer is A.
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Detailed Solution
v=1cm, R=2 cmBy using μ2v−μ1u=μ2−μ1R1−1−1.5u=1−1.5−2⇒u=−1.2 cm
An air bubble in sphere having 4 cm diameter appears 1 cm from surface nearest to eye when looked along diameter. If aμg =1.5, the distance of bubble from refracting surface is