When a bright light source is placed in front of a lens,
Chapter , Problem 102(choose chapter or problem)
When a bright light source is placed in front of a lens, there is an upright image from the lens. There is also a faint inverted image from the lens on the incident-light side due to reflection from the front surface of the lens. When the lens is turned around, this weaker, inverted image is in front of the lens. Find the index of refraction of the lens.
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