A mirror has a focal length of 50 cm and the image form is at a 40 cm find the object distance and the radius
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2f = r
2(50)=r
100 cm =radius
If it's a plain mirror
v=u
40=40
u = 40cm
2(50)=r
100 cm =radius
If it's a plain mirror
v=u
40=40
u = 40cm
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