Q)
(chatquestion)...A microscope is focussed on a mark on a piece
paper and then a slab of glass of thickness 3
cm and refractive index 1.5 is placed over the mark.
How should the microscope be moved to get the
mark in focus again :-
of
(1) 1 cm upward
(2) 4.5 cm downward
(3) 1 cm downward
(4) 2 cm upward
...
