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A rectangular glass prism of thickness 12cm is placed on a Mark ‘A’ on a...

A rectangular glass prism of thickness 12cm is placed on a Mark ‘A’ on a piece of a paper resting on a horizontal bench.
i) Draw a ray diagram to show the apparent position of the mark ‘A’ in the glass
ii) If the refractive index of the material of the glass is 1.5, calculate the apparent displacement of the glass
(b) i. Describe an experiment to determine the refractive index, n, of the material of an equilateral triangular glass prism using the minimum deviation method
ii. Calculate the angle of minimum deviation, if the refractive index is 1.25
(c) i. What is echo?
ii. State two useful applications of echoes
iii. Explain why the walls, floors and ceilings of a recording studio is heavily padded?

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