Answer:
13.3 cm
Explanation:
Mirrors work using the principle of refraction.
We can solve this problem by using the mirror equation:
[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]
where
f is the focal length of the mirror
p is the distance of the object from the mirror
q is the distance of the image from the mirror
In this problem, we have:
f = 8 cm is the focal length
p = 20 cm is the distance of the light bulb from the mirror
Solving for q, we find the distance of the image from the mirror:
[tex]\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{8}-\frac{1}{20}=0.075\\q=\frac{1}{0.075}=13.3 cm[/tex]
