Find the focal length of a convex mirror of radius of curvature 1m. 2. Focal length of a convex
mirror is 50 cm. What is its radius of curvature? 3. Radius of curvature of a concave mirror is 25 cm.
What is its focal length? 4. A concave mirror produces 10 cm long image of an object of height of
2cm. What is the magnification produced?
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1. Radius of Curvature (R) = 1 m = 100 cm
Focal Length (f) = R/2
= (100/2) cm
= 50 cm
2. f = 50 cm
R = 2f
= (2*50) cm
= 100 cm
3. R = 25 cm
f = R/2
= (25/2) cm
= 12.5 cm
4. Image Height (I) = 10 cm
Object Height (O) = 2 cm
Magnification is = I/O
= +(10/2)
= +5
I hope this helps.
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