Question

# A small object is embedded in a glass sphere (μ=1.5) of radius 5.0 cm at a distance 1.5 cm left to the centre. Locate the image of the object as seen by an observer standing to the left of the sphere?

A
1 cm left to the centre
B
2 cm left to the centre
C
1 cm right to the centre
D
2 cm right to the centre
Solution
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#### We know,μairv−μglassu=μair−μglassRHere, The radius of the glass sphere (R) is 5 cm, and the object distance is u=−(5−1.5)=−3.5 cmWe put the values in the formula and get-1v−1.5−3.5=1−1.5−51v+37=−0.5−51v+37=1101v=110−37=7−30701v=7−3070=−2170Therefore, v=7021≈3 cm from the surface of the glass sphere and the image of the object as seen by an observer standing to the left of the sphere will be at 2 cmleft to the center.

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