The focus distance in order to see the image of the object is 0.75 meters.
We need to know about the focus distance to solve this problem. The focus distance is the point that a normal observer without accommodation can clearly see. The formula of focus distance is
1/f = 1/s + 1/s'
where f is focus distance, s is object distance, and s' is image distance.
From the question above, the parameters given are
s = 1 m
s' = 3 m
By substituting the given parameters, we can calculate the focus distance
1/f = 1/s + 1/s'
1/f = 1/1 + 1/3
1/f = 3/3 + 1/3
1/f = 4/3
f = 3/4 m
f = 0.75 m
Find more on the focus distance at: https://brainly.com/question/28039799
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