Refractive index

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Refractive index of glass using triangular prism
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QUESTIONS:
1. Plot a graph of d against i.
2. From the graph determine (i) the minimum deviation, D and the corresponding angle of incidence iDmin
3. Comment on your results.
4. Calculate the refractive index of the glass of the prism material using the equation
n=Sin((A+D min)/2)/Sin A/2 Where A=600
5. Determine the error in n
6. Explain why it is not advisable to use small values of i in performing this experiment.

patok
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I do not understand how you got the normal for the emergent ray

zoeadah
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Sir how can we find the minimum deviation?

ladikalbamu
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Sir how can we find the minimum deviation?

ladikalbamu