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Without Iris glasses, Isaac can see objects clearly only
Chapter 27, Problem 34P(choose chapter or problem)
Problem 34P
Without Iris glasses, Isaac can see objects clearly only if they are less than 4.5 m from his eyes. What focal length glasses worn 2.1 cm from his eyes will allow Isaac to see distant objects clearly?
Questions & Answers
QUESTION:
Problem 34P
Without Iris glasses, Isaac can see objects clearly only if they are less than 4.5 m from his eyes. What focal length glasses worn 2.1 cm from his eyes will allow Isaac to see distant objects clearly?
ANSWER:
Step 1 of 2
Here we need to determine the focal length of the glasses. The distance of the glass from the eye is , and the person can see upto distance.
In the given case, the image distance is given by,
Using and ,
The object distance is taken to be .