In the experiment for finding the refractive index of a convex lens material and an unknown liquid, how are the refractive index and focal length calculated?
University of Ilorin PHY108 2025 past question
- Using the lensmaker's equation and Snell's law applied to measured focal lengths of the lens alone and the lens-liquid combination
- By measuring the angle of refraction only
- By counting the number of images formed
- By measuring the thickness of the lens only
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