*The focal length of a lens of power -2.5 D is: *
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0
Answer:
-0.4m
Explanation:
f= 1/D
f= 1/-2.5
f= -0.4
...the focal length of lens is -0.4m.
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Answered by
0
Answer:
first 1/Focal length [in meters] = power
power is -2.5
and 1/F is -2.5
F is 1/-2.5
=-0.4 meters
Explanation:
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