Frome given statement , the Object is hO = + 4.0 cm;
The Object is palced at a of distance u D= – 25.0 cm;
The concave mirror radius = 30 cm so, the Focal length of the mirror will be F = –15.0 cm;
//To find out the screen placement for sharp image,let's represent as M//
The formula to find the screen distance or screen placement for sharp image is,
1/M+ 1/D= 1/F. //rearrange the formula//
1/ν = 1/F - 1/D= - ( 1/15cm) - ( - (1/25cm) ) = -1/15.0 + 1/25.0 = - (2 /75 ) = - 37.5 cm
To fund out the height of the image, let's represent by H
The formula to find height of an image is,
H/O = - (M/D). // rearrange the formula//
or H = - (MO)/D = - { [ (37.5)(4) ] / 25 } = -6cm