Mirror Equation Video Lessons

Concept

# Problem: A concave mirror produces a virtual image that is three times as tall as the object. If the object is 26 cm in front of the mirror, a. what is the image distance?b.  What is the focal length of this mirror?

###### FREE Expert Solution

Mirrorequation:
$\overline{)\frac{\mathbf{1}}{{\mathbit{s}}_{\mathbit{o}}}{\mathbf{+}}\frac{\mathbf{1}}{{\mathbit{s}}_{\mathbit{i}}}{\mathbf{=}}\frac{\mathbf{1}}{\mathbit{f}}}$

Magnification:

$\overline{){\mathbf{m}}{\mathbf{=}}\frac{{\mathbf{h}}_{\mathbf{i}}}{{\mathbf{h}}_{\mathbf{o}}}{\mathbf{=}}{\mathbf{-}}\frac{{\mathbf{s}}_{\mathbf{i}}}{{\mathbf{s}}_{\mathbf{o}}}}$

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###### Problem Details

A concave mirror produces a virtual image that is three times as tall as the object. If the object is 26 cm in front of the mirror,

a. what is the image distance?

b.  What is the focal length of this mirror?