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AIIMS2007PhysicsRay Optics

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 ) ?

Options

  1. A( 1 42 )
  2. B( 1 56 )
  3. C( 1 72 )
  4. D( 1 31 )

Correct answer

D. ( 1 31 )

Step-by-step solution

Time of exposure ( f^2 ) ( aligned & 1 60 1 1 = t 1.4^2 t=0.03266 ~s & t= 1 31 ~s . aligned )

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