Could someone please help me with this? Use the worked example above to help you

Question

Could someone please help me with this?

Use the worked example above to help you solve this problem. A certain microscope has two interchangeable objectives. One has a focal length of 2.1 cm, and the other has a focal length of 0.2 cm. Also available are two eyepieces of focal lengths 2.6 cm and 5.2 cm. If the length of the microscope is 18-cm, compute the magnifications for the following combinations: the 2.1-cm objective and 5.2-cm eyepiece; 2.1-cm objective and 2.6-cm eyepiece; 0.21-cm objective and 5.2-cm eyepiece. 2.1 cm objective and 5.2 cm eyepiece m = 2.1 cm objective and 2.6 cm eyepiece m = 0.21 cm objective and 5.2 cm eyepiece m = Combine the 0.21 cm objective with the 2.6 cm eyepiece and find the magnification. m =

Explanation / Answer

magnification M = LD/(fo*fe)

1)

M = (18*25)/(2.1*5.2) = 41.21

2)

M = (18*25)/(2.1*2.6) = 82.42

3)

M = (18*25)/(0.21*2.6) = 824.17

4)

M = (18*25)/(0.21*5.2) = 412.1

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