Question

Calculate the focal length of the mirror formed by the convex side of a shiny spoon that has a 2.23 cm radius of curvature.

Answer 1

1.115cm

Step-by-step explanation:

For a given mirror (concave or convex), the focal length (f) is related to its radius of curvature (R) by the following;

f =
`(R)/(2)` ----------------(i)

Now, from the question;

R = 2.23cm

To get the focal length, substitute the value of R = 2.23cm into equation (i) as follows;

f =
`(2.23)/(2)`

f = 1.115cm

Therefore, the focal length of the mirror is 1.115cm