it is not advisable to use small values of i in performing an experiment of refraction light using triangular prism because it is likely that the refracted ray will not be accurately measured at all.
The term refraction has to do with the bending of light at the interface between two media. We now that this refraction takes place in a glass block, a triangular prism or a lens. It also takes place in nature in the sense of having a mirage.
Now, it is not advisable to use small values of i in performing an experiment of refraction light using triangular prism. This is because, if a small value is used for the incident ray i, it is likely that the refracted ray will not be accurately measured at all.
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