An upright object 4 cm tall is placed 20cm in front of a concave mirror
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Height of the object =4
Object distance=20
In concave mirror height of object is positive and all are negative
1/f=1/u+1/v
1/f=1/20 - 1/4
1/f=1-5/20
1/f=-4/20
1/f=-1/5
f=-5 cm
Object distance=20
In concave mirror height of object is positive and all are negative
1/f=1/u+1/v
1/f=1/20 - 1/4
1/f=1-5/20
1/f=-4/20
1/f=-1/5
f=-5 cm
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