bu size of the image formed. 20. When an obiect is placed 20 con from a concave mirror, a real image magnified three times is formed Find : e an object 2 cm tall is placed 9 cm away from it Find the (a) the focal length of the mirror. (6) Where must the object be placed to give a virtual image three times the height of the object? 21 A dentist's mirror has a radius of
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Explanabu size of the image formed. 20. When an obiect is placed 20 con from a concave mirror, a real image magnified three times is formed Find : e an object 2 cm tall is placed 9 cm away from it Find the (a) the focal length of the mirror. (6) Where must the object be placed to give a virtual image three times the height of the object? 21 A dentist's mirror has a radius of
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