A light ray is incident perpendicular to the plane mirror. What is the angle of incidence and the angle of reflection respectively?

90^{\circ}, 180^{\circ}

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90^{\circ}, 180^{\circ}

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0^{\circ}, 0^{\circ}

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0^{\circ}, 90^{\circ}

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Solution

The correct option is C $0^{\circ}, 0^{\circ}$
When light incident perpendicular to the plane mirror i.e along with the normal, angle of incidence (angle between ray and normal) is zero.
From first law of reflection. Angle of incidence, $i =$ Angle of reflection, $r$
So, Angle of reflection $= 0^{\circ}$

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A light ray is incident perpendicular to the plane mirror. What is the angle of incidence and the angle of reflection respectively?

The correct option is C 0∘, 0∘When light incident perpendicular to the plane mirror i.e along with the normal, angle of incidence (angle between ray and normal) is zero. From first law of reflection. Angle of incidence, i= Angle of reflection, r So, Angle of reflection =0∘