Question

The focal length of a concave mirror is 17.5 cm. An object is located 38.5 cm in front of this mirror. How far in front of the mirror is the image located?

Answer 1

Step-by-step explanation:

object distance u = 38.5 cm ( negative )

focal length f = 17.5 cm ( negative )

mirror formula

1 / v + 1 / u = 1 / f

1 / v - 1 / 38.5 = - 1 / 17.5

1 / v = - 1 / 17.5 + 1 / 38.5

= - 0 .03116

v = - 1 / .03116 = - 32 cm

Image will be formed in front of the mirror at 32 cm distance .