Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsReflection at plane surfaceEasy2 minPYQ_2020

PhysicsEasysingle choice

A point object $O$ and a mirror $M$ move with velocities of $3 cm s^{- 1}$ and $4 cm s^{- 1}$ respectively as shown in the figure. ${OO}^{'}$ is the normal to the mirror. What is the velocity of the image?

Options:

Answer:

Solution:

Only velocity of the mirror along ${OO}^{'} (= 2 cm s^{- 1})$ is relevant

Relative to mirror : velocity = $5 cm s^{- 1}$

$\Rightarrow$ the velocity of image relative to mirror = $5 cm s^{- 1}$ towards left.

Relative to laboratory frame : velocity of image = $7 cm s^{- 1}$ .

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

⏱ 2mℹ️ Source: PYQ_2020

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