Question 166: Ray Optics

Question

Formation of real image using a biconvex lens is shown below :
If the whole set up is immersed in water without disturbing the object and the screen positions, what will one observe on the screen ?

Accepted Answer

From $${1 \over F} = \left( {{\mu _{rel}} - 1} \right)\left( {{1 \over {{R_1}}} - {1 \over {{R_2}}}} \right)$$
Focal length of lens will change hence image disappears from the screen.

Answer

Image disappears

Answer

Magnified image

Answer

Erect real image

Answer

No change

Ray Optics

Formation of real image using a biconvex lens is shown below : If the whole set up is immersed in water without disturbing the object and the screen positions, what will one observe on the screen ?

Choose the correct answer: