ICSE Class 10 Physics 2017 Solved Paper

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How is refractive index of a material related to:
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Question : 9
Total: 65
Real and apparent depth?
Solution:  
‌aµm=‌
‌ Real depth ‌
‌ Apparent depth ‌

Where ‌aµm is the refractive index of the medium with respect to air.
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