Question:
what is if you have an object 2.0m from the concave mirror and the image is 4.0m from the mirror?
Answer:
Using mirror formula
1/f=1/u+1/v
Here, f= focal length of morror
u=object distance= 2m
v=image distance=4m
So, 1/f=1/2+1/4
Focal length, f=0.75m
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