The incident ray, reflected ray and the outward drawn normal are denoted by the unitvectors a → , b → and c → respectively. Then choose the correct relation for these vectors.

a → = sin θ i ^ - cos θ j ^ b → = sin θ i ^ + cos θ j ^ c → = j ^ a → - 2 a → · c → c → = sin θ i ^ + cos θ j ^

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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsReflection at plane surfaceEasy2 minPYQ_2021

PhysicsEasysingle choice

The incident ray, reflected ray and the outward drawn normal are denoted by the unitvectors $\vec{a}, \vec{b}$ and $\vec{c}$ respectively. Then choose the correct relation for these vectors.

Options:

Answer:

Solution:

$\vec{a} = \sin θ \hat{i} - \cos θ \hat{j}$

$\vec{b} = \sin θ \hat{i} + \cos θ \hat{j}$

$\vec{c} = \hat{j}$

$\vec{a} - 2 (\vec{a} \cdot \vec{c}) \vec{c} = \sin θ \hat{i} + \cos θ \hat{j}$

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Reflection at plane surface

⏱ 2mℹ️ Source: PYQ_2021

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