The curve of angle of incidence versus angle of deviation shown below has been plotted for prism.

The value of angle $i_{1}$ in degrees is

$40^{\circ}$

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$60^{\circ}$

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$70^{\circ}$

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$90^{\circ}$

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Solution

The correct option is D
$90^{\circ}$

$δ = i_{1} + i_{2} - A$

$70 = 40 + i_{1} - 60$

$i_{1} = 90^{\circ}$

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Similar questions

The curve of angle of incidence versus angle of deviation shown below has been plotted for prism.

The value of refractive index of the prism used is

Consider the figure:

If $∠$ 1 = $80^{\circ}$ , $∠$ 2 = $70^{\circ}$ , and x = $10^{\circ}$ +y, then find the value of $∠$ x (in degrees).

∠ B

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