Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minPYQ_2007

PhysicsMediumsingle choice

The camera lens has an aperture of $f$ and the exposure time is $(1/60) s$ . What will be the new exposure time if the aperture become $1.4 f$ ?

Answer:

Solution:

Time of exposure $\propto f^{2}$ $\frac{1}{60} \times \frac{1}{1} = \frac{t}{1. 4 ^{2}} \Rightarrow t = 0.03266 s t = \frac{1}{31} s .$

Stream:AIIMSSubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at curved surface/Lens

⏱ 2mℹ️ Source: PYQ_2007

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