Error in angular magnification calculation

  • #1
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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.
 

Answers and Replies

  • #4
haruspex
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I dont have angular magnification or focal length so I cant find the distance.
Did you find the reference to 25 at the link?
 
  • #5
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Did you find the reference to 25 at the link?
I have solved the question using 25cm for the distance. Thankyou for your guidance. Sorry earlier I was looking at the wrong portion of this link.
 
  • #6
haruspex
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I have solved the question using 25cm for the distance. Thankyou for your guidance. Sorry earlier I was looking at the wrong portion of this link.
Ok, good.
 

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