Question

an object 20 cm from a spherical mirror give rise to a virtual image 15 CM behind the mirror determine the magnification focal length and type of mirror used​

Answer 1

Answer:

mirror formula is used: 1/v + 1/u =1/f

1/15+1/20=1/f

1/f= 1/15+1/20

1/f=4+3/60

1/f=7/60

the image is real