You have a spherical mirror with a radius of curvature of +14 cm (so it is conca

Question

You have a spherical mirror with a radius of curvature of +14 cm (so it is concave facing you). You are looking at an object whose size you want to triple in the image, so you can see it better. Where should you put the object? Where will the image be? Will it be real or virtual? (Enter your object distances from smallest to largest. Indicate the location of the image with the sign of your answer.)

do,1 di,1 smaller object distance ---Select--- real virtual larger object distance ---Select--- real virtual

Explanation / Answer

1. m=v/u =3

v=3u

f=14/2=7cm

1/f=1/u-1/v

f= uv/u-v

u= -2*14/3 = 9.33 cm is object distance

v=28 cm is image distance----real

2. f =3u/4

u=3*7/4= 5.25 object distance

v= 15.75 cm image distance-virtual

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