Question

A object at length 6cm pleased on the principal axis of concave mirror of focal length F & at distance of 4F .Find length of image

Answer 1

the length of the image will be -2/F

image will be inverted and diminished and real

v=f[u]/-u-f

v=F[4F]/-4F+F

v=-4/3

Hi/Ho=-[v/u]

Hi/6=-[4/3/4F]

Hi/6=1/3F

Hi= -[2/F]