A laser beam of cross-sectional diameter -d- is incident at an angle - on a glass plate as shown in figure- After refraction-

The correct option is B diameter of beam increasesFrom the diagram, d' gt;d ...

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Summary

A laser beam ...

Question

A laser beam of cross-sectional diameter 'd' is incident at an angle $θ$ on a glass plate as shown in figure. After refraction,

beam converges at a point

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beam diverges

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diameter of beam decreases

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diameter of beam increases

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Solution

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d

(d = 3 m m, θ = 45^{o}

\frac{n_{g l a s s}}{n_{a i r}} = \frac{3}{2})

d

(d = 3 mm, θ = 45^{\circ} and \frac{n_{g l a s s}}{n_{a i r}} = \frac{3}{2})

\frac{3}{2}

θ = 60^{\circ}

D = (a \sqrt{\frac{b}{c}}) d

[\frac{c}{a} + b]

d = 2 c m

60^{o}

μ = 3 / 2

60^{\circ}

45^{\circ}

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