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Finding the refractive index n = sin i / sin r
The figure shows a ray of light moving from air to a piece of Perspex. Find the refractive index of the Perspex.
n = sin i/ sin r; i is always the angle in air.
The diagram above shows that a light ray propagates from water into air at an angle of incident, 40o. What is the value of s?
[Refractive index of water, n = 1.33]
Figure above shows the ray diagram of a light passing through a transparent block . Find the refractive index of the block.
Finding speed of light from n=c/v
It is known that the speed of light in vacuum = 3.0 ´108 ms-1. If the refractive index of water is 1.33, find the speed of light in water.
Finding refractive index from apparent depth
A coin is placed into an empty container. Some transparent liquid is poured into the container, and the apparent dept is 40% less than the real depth. Find the refractive index of the liquid.
Finding thickness of a glass block from n=D/d
A glass block appears to be 2 cm thick when viewed from above. Find the actual thickness of the block if the refractive index of the glass is 1.6.