Answer:
field of view = 0.45 mm
Explanation:
given data
object lens = 4x
view microscope = 4.5 mm
to find out
field view at 40x
solution
we know microscope have objective lens like 4x or 10x or 100x that magnify 4 time or 10 time or 100 time respectively
so we can say that field of view will be decreasing by increasing number of magnify lens
so for clear resolution 40 x field of view will be
40 x field of view = 4x × 4.5 mm ..............1
field of view = [tex]\frac{4*4.5}{40}[/tex]
field of view = 0.45 mm