If the near-point distance of the jeweler is 21.8 c m , and the focal length of

Question

If the near-point distance of the jeweler is 21.8cm , and the focal length of the magnifying glass is 7.50 cm, find the angular magnification when the diamond is held 5.51cm from the magnifying glass. Assume the magnifying glass is directly in front of the jeweler's eyes.
If the near-point distance of the jeweler is 21.8cm , and the focal length of the magnifying glass is 7.50 cm, find the angular magnification when the diamond is held 5.51cm from the magnifying glass. Assume the magnifying glass is directly in front of the jeweler's eyes.

Explanation / Answer

angular mag it is (1/f - 1/di)N ,
di = 5.51 cm ,
f= 7.5 cm ,
N = 21.8 cm ,
put these values in above formula we get
angular mag = -1.35

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