Answer:
The ratio of
and
is 0.9754
Explanation:
Given that,
Distance z = 4.50 d
First equation is


Second equation is

We need to calculate the ratio of
and 
Using formula


Put the value into the formula


Hence, The ratio of
and
is 0.9754
Increasing the masses of the objects and decreasing the distance between the objects
This is the process of changing the shape of the eye lens to focus on near or distant objects.