Ansel Places an Object 30 Cm from a Thin Convex

question 66

Multiple Choice

Ansel places an object 30 cm from a thin convex lens along the axis.If a real image forms at a distance of 10 cm from the lens,what is the focal length of the lens?

• A)30 cm
• B)15 cm
• C)10 cm
• D)7.5 cm

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