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To engrave wishes of good luck on a watch, an engraver
Chapter 27, Problem 53P(choose chapter or problem)
Problem 53P
To engrave wishes of good luck on a watch, an engraver uses a magnifier whose focal length is 8.65 cm. If the image formed by the magnifier is at the engraver’s near point of 25.6 cm, find (a) the distance between the watch and the magnifier and (b) the angular magnification of the engraving. Assume the magnifying glass is directly in front of the engraver’s eyes.
Questions & Answers
QUESTION:
Problem 53P
To engrave wishes of good luck on a watch, an engraver uses a magnifier whose focal length is 8.65 cm. If the image formed by the magnifier is at the engraver’s near point of 25.6 cm, find (a) the distance between the watch and the magnifier and (b) the angular magnification of the engraving. Assume the magnifying glass is directly in front of the engraver’s eyes.
ANSWER:
Step 1 of 5
The virtual image produced by a magnifying glass of focal length is located at an engraver's near point. This virtual image is at its greatest magnification.
(a) Calculate the distance between the watch and the magnifier.
The thin-lens equation is given by
………. Equation (1)