How Is Angular Magnification Calculated for a Microscope?

[xamy]

1. Homework Statement
The wing of an insect is 1.7 mm long. When viewed through a microscope, the image is 1.4 m long and is located 5.9 m away. Determine the angular magnification.

Homework Equations

di/do=hi/ho
M=beta/alpha

alpha=object size/object distance

beta=image size/image distance

The Attempt at a Solution

di/do=hi/ho
5.9/do=1.4/0.0017
do=0.00716

alpha=0.0017/0.00716=0.237

beta=1.4/5.9=0.237
M=1
This answer is wrong. Can anyone please point out the mistake.

 

[Aceix]

1. Homework Statement
The wing of an insect is 1.7 mm long. When viewed through a microscope, the image is 1.4 m long and is located 5.9 m away. Determine the angular magnification.

Homework Equations

di/do=hi/ho
M=beta/alpha

alpha=object size/object distance

beta=image size/image distance

The Attempt at a Solution

di/do=hi/ho
5.9/do=1.4/0.0017
do=0.00716

alpha=0.0017/0.00716=0.237

beta=1.4/5.9=0.237
M=1
This answer is wrong. Can anyone please point out the mistake.

Which kind of microscope is being used, and in what mode?

 

[xamy]

This is all the information that I have. I did all the calculations using simple microscope equations.

 

[haruspex]

Thread duplicated at https://www.physicsforums.com/threads/error-in-angular-magnification-calculation.805201/.
(Please don't post the same question as a new thread.)