An unpolarised light is incident upon a glass plate of refractive index 1.54 at Brewster’s angle and gets completely plane polarized. The angle of polarization is: $(g i v e n t a n 57^{\circ} = 1.54$ )

57^{\circ}

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46^{\circ}

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33^{\circ}

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82^{\circ}

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Solution

The correct option is A $57^{\circ}$
$μ = t a n i_{p}, 1.54 = t a n i_{p}, i_{p} = 57^{\circ}$

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Q. Assertion

(A)

: When an unpolarized light is incident on a glass plate at Brewster's angle, the reflected ray and refracted ray are mutually perpendicular.

Reason

(R)

: The refractive index of glass is equal to the sine of the angle of polarization.

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An unpolarised light is incident upon a glass plate of refractive index 1.54 at Brewster’s angle and gets completely plane polarized. The angle of polarization is: (given tan57∘=1.54)

The correct option is A 57∘μ=tanip,1.54=tanip,ip=57∘

An unpolarised light is incident upon a glass plate of refractive index 1.54 at Brewster’s angle and gets completely plane polarized. The angle of polarization is: $(g i v e n t a n 57^{\circ} = 1.54$ )

The correct option is A $57^{\circ}$
$μ = t a n i_{p}, 1.54 = t a n i_{p}, i_{p} = 57^{\circ}$