The focal length of a convex lens is fL = 10 cm. On immersing in water, it will act as a

Asked In Exam: BPSC TRE 2.0

Options

  • A. Convex lens of fL = 10 cm
  • B. Concave lens of fL = 10 cm
  • C. Convex lens of fL > 10 cm
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. Convex lens of fL > 10 cm

Detailed Explanation

The refractive index contrast between glass and water is smaller than between glass and air, so the convex lens remains convex but its focal length increases.

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BPSC TRE 4 General Science practice set 2

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