at what distance of plane mirror of focal length2.5m should a boy stand so that his image has height equal to half of original height

at what distance of plane mirror of focal length2.5m should a boy stan

1.	at what distance of plane mirror of focal length2.5m should a boy stand so that his image has height equal to half of original height
Answer» ACTUAL height be x=(x/2)/x=1/21/2= -v/uUsing sign CONVENTION, 1/2 = v/uu=2vThat is OBJECT distance is twice the image distanceSo, the object should be PLACED at the centre of curvature and the image will be FORMED at focus.Object should be placed at centre of curvature =2(2.5)=5cmThe image will be formed at focus =2.5cm

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at what distance of plane mirror of focal length2.5m should a boy stand so that his image has height equal to half of original height

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