The expected graphical representation of the variation of angle of deviation ' δ ' with angle of incidence 'i' in a prism is: (a) (b) (c) (d)

Answer: (b). As i increases, δ first decreases, reaches the minimum δm (at i = e), then increases. The curve is smooth and not symmetric, with a single minimum (U-shaped). So the answer is (b).

The expected graphical representation of the variation of angle of… | JEE Main 2021 (27 Jul, Shift 2)

Q57JEE Main 2021 · 27 JUL · SHIFT 2Easy

Prism, Dispersion & Scattering

The expected graphical representation of the variation of angle of deviation ' $\delta$ ' with angle of incidence 'i' in a prism is:

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Answer: (b)

As $i$ increases, $\delta$ first decreases, reaches the minimum $\delta_m$ (at $i = e$ ), then increases.
The curve is smooth and not symmetric, with a single minimum (U-shaped).
So the answer is (b).

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