Two Lenses Are Used to Create an Image of a 15.0-Cm

question 7

Multiple Choice

Two lenses are used to create an image of a 15.0-cm tall source that is located 43.0 cm to the left of the first lens,which is a biconcave thin polycarbonate lens (index of refraction n = 1.67) and has a radius of curvature of 25.0 cm for both front and back surfaces.The second lens is 36.0 cm to the right of the first lens.The second lens is a converging lens with a focal length magnitude of 25.0 cm.What is the magnification?

• A)-0.214
• B)-1.20
• C)-0.781
• D)-0.395
• E)-2.53

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Definitions:

Muscle Fiber

The cylindrical, multinucleate cells that make up skeletal muscles, responsible for contracting to produce movement.

Myofibril

Within a muscle fiber, a threadlike array of proteins organized as a series of sarcomeres (contractile units).

Sarcomere

Contractile unit of muscle; an array of actin and myosin filaments arranged in parallel and bounded on either end by an array of cytoskeletal elements (a Z line).

Red Muscle Fibers

Muscle fibers with high myoglobin content and mitochondria, adapted for endurance and sustained activity by aerobic respiration.