A plane mirror of length 2 m is kept along the line y = − x as shown in the figure. An insect having velocity of 4 i ^ cm / s is moving along the x -axis from far away. The time span for which the insect can see its image will be

Insect can see its image from A to B. A B = cos 4 5 ∘ l = 2 2 m Time = 4 × 1 0 − 2 2 2 = 50 2 s .

Start Free Mock LoginAlready registered? Login here

Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsReflection at plane surfaceMedium2 minQB

PhysicsMediumsingle choice

A plane mirror of length 2 m is kept along the line $y = - x$ as shown in the figure. An insect having velocity of $4 \hat{i} cm / s$ is moving along the x -axis from far away. The time span for which the insect can see its image will be

Options:

Answer:

Solution:

Insect can see its image from A to B.

$A B = \frac{l}{cos 4 5 ^{\circ}} = 22 m$

Time $= \frac{2 2}{4 \times 1 0 ^{- 2}} = 502 s$ .

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

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...