A prism of angle A = 1° has a refractive index μ = 1.5. A good… | JEE Main 2020 (5 Sep, Shift 2)

Q68JEE Main 2020 · 5 SEP · SHIFT 2Easy

Prism, Dispersion & Scattering

A prism of angle A = 1° has a refractive index $\mu$ = 1.5. A good estimate for the minimum angle of deviation (in degrees) is close to $\frac{N}{10}$ .

Value of N is ____.

Numerical answer type. Work it out, then open the answer.

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Answer: 5

Thin prism: $\delta_m = (\mu - 1)A$ .
$\delta_m = (1.5 - 1) \times 1^\circ = 0.5^\circ = \frac{5}{10}$
So $N = 5$ .

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