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You are given an equilateral glass prism...

You are given an equilateral glass prism of refractive index 'n'. A light rays is incident on one of its faces at an angle `'i_(1)'` .
a. What happens when you increase `'i_(l)'` gradually ?
b. What happens if `'i_(l)'` is increased beyond a certain value ?
c. Give the graphical representation of variation

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a. As `.i_(1).` increases gradually, the angle of deviation .d. decreases.
b. For a particaular value of `.i_(1).` , the angle .d. reaches a minimum value. If again we increase `.i_(1).`, then .d. also increases.
c.
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