ICSE Class 10 Answered
4th mcq
Asked by lovemaan5500 | 06 Jan, 2018, 07:23: AM
Expert Answer
When the angle of incidence is critical angle, angle of refraction is 90°.
Hence
i is angle of incidence, r is angle of refraction/emergence
Answered by | 07 Jan, 2018, 01:01: PM
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