A Concave Mirror Has an Object Placed 40 Cm in Front

question 64

Multiple Choice

A concave mirror has an object placed 40 cm in front of it. An image forms 60 cm in front of the mirror. What is the focal length of the mirror?

• A) 60 cm
• B) 120 cm
• C) −120 cm
• D) 100 cm
• E) 24 cm

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