We have that the mirror’s focal length is is mathematically given as
f=7.4cm
From the question we are told
A concave mirror forms a real image at 25 cm from the mirror surface along the principal axis. If the corresponding object is at 10.0 cm distance, what’s the mirror’s focal length?
Generally the equation for the Mirror is mathematically given as
[tex]\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\\\\Therefore\\\\\frac{1}{f}=\frac{1}{10}+\frac{1}{29}\\\\\frac{1}{f}=0.13cm\\\\f=7.4cm[/tex]
Therefore
The mirror’s focal length is is mathematically given as
f=7.4cm
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