A Concave Mirror Forms a Real Image at 25

question 38

Multiple Choice

A concave mirror forms a real image at 25.0 cm from the mirror surface along the principal axis.If the corresponding object is at a 10.0-cm distance,what is the mirror's focal length?

• A)1.43 cm
• B)16.7 cm
• C)12.4 cm
• D)7.14 cm

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