Amicroscope is focused on an amoeba. part a when a 0.15-mm-thick cover glass (n=1.50) is placed over the amoeba, by how far must the microscope objective be moved to bring the organism back into focus? express your answer in millimeters. δsδ s = nothing mm request answer part b must it be raised or lowered?

∵The apparent depth is less therefore we need to raise the objective away from the placed object.

Explanation:

Given:

Real depth,

refractive index of the medium,

We know,

where:

apparent depth of the object

Now, the difference in the real and apparent depths:

∵The apparent depth is less therefore we need to raise the objective away from the placed object.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.