Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsReflection at plane surfaceEasy2 minPYQ_2024

PhysicsEasysingle choice

If $\overset{n}{^}_{1}, \overset{n}{^}_{2}$ and $\hat{t}$ represent, unit vectors along the incident ray, reflected ray and normal to the surface respectively, then

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Solution:

$Hint: \overset{n}{^}_{1} = - cos θ \hat{t} + sin θ \hat{i} \overset{n}{^}_{2} = cos θ \hat{t} + sin θ \hat{i} \overset{n}{^}_{2} - \overset{n}{^}_{1} = 2 cos θ \hat{t} = - 2 (\overset{n}{^} \cdot \hat{t}) \hat{t} \overset{n}{^}_{1} \cdot \hat{t} = - cos θ \overset{n}{^}_{2} = \overset{n}{^}_{1} - 2 (\overset{n}{^}_{1} \cdot \hat{t}) \hat{t}$

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

⏱ 2mℹ️ Source: PYQ_2024

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