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QJEEM19Ph4f30: JEE Main 2019 Physics - Class 12 JEEM19Ph4f30 Solution: Formation of real image using a biconvex lens is shown below :…

Formation of real image using a biconvex lens is shown below :

JEE Main 2019 (Online) 12th January Evening Slot Physics - Geometrical Optics Question 169 English

If the whole set up is immersed in water without disturbing the object and the screen positions, what will one observe on the screen ?

Multiple Choice Options

  • A Image disappears
  • B Magnified image
  • C Erect real image
  • D No change

Step-by-Step Verified Solution

From 1F=(μrel−1)(1R1−1R2){1 \over F} = \left( {{\mu _{rel}} - 1} \right)\left( {{1 \over {{R_1}}} - {1 \over {{R_2}}}} \right)

Focal length of lens will change hence image disappears from the screen.

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