27. (a) what magnification is produced by a 0.150 cm focal length microscope objective that is 0.155 cm from the object being viewed? (b) what is the overall magnification if an 8× eyepiece (one that produces a magnification of 8.00) is used?

magnification = - 30

overall magnification = -240

Explanation:

given data

Focal length of microscope objective f = 0.150 cm

Object distance from microscope objective do = 0.155 cm

magnification by eyepiece = 8 ×

to find out

What magnification is produced  and overall magnification

solution

we consider here  Image distance from microscope objective is =  di

so that

Magnification produced by objective will be = -

so we find here  di by given equation that is

    ..................1

di = 4.65 cm

so that magnification by object will be

magnification = -

magnification = -

magnification = - 30

and

overall magnification will be

overall magnification = magnification by objective × magnification by eyepiece   ........................2

overall magnification = -30 × 8

overall magnification = -240

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.