AS level hard physics question
A student has been asked to find the refractive index of a liquid. She has found instructions for a method which uses a concave mirror and a long pin. These are arranged as in the diagram.
The pin is held in a clamp on a retort stand and is moved up and down until it seems to the student that the pin and its image are in the same place, A. The liquid is then poured into the mirror and the pin moved until it again appears to be in the same place as its image, B. The distances, SA and SB, from the surface of the liquid S to A and B are then measured. The refractive index of the liquid μ is given by μ = SA SB . For one liquid the student finds that SA is 230 mm and SB is 172 mm. (a) Explain how you would measure the distances SA and SB. You may add to the diagram if you wish.
any ideas?
The pin is held in a clamp on a retort stand and is moved up and down until it seems to the student that the pin and its image are in the same place, A. The liquid is then poured into the mirror and the pin moved until it again appears to be in the same place as its image, B. The distances, SA and SB, from the surface of the liquid S to A and B are then measured. The refractive index of the liquid μ is given by μ = SA SB . For one liquid the student finds that SA is 230 mm and SB is 172 mm. (a) Explain how you would measure the distances SA and SB. You may add to the diagram if you wish.
any ideas?
Original post by anon96
.
Any ideas for what, part a? What are your ideas?
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