Two Lenses,the First with Focal Length -12

question 35

Multiple Choice

Two lenses,the first with focal length -12.5 cm and the second with focal length 20.0 cm,are separated by 15.0 cm.If an object is place 50.0 cm in front of the first lens,what is the total magnification?

• A) 20.0
• B) -20.0
• C) 1.25
• D) -1.25
• E) -0.800

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Definitions:

Barrier Methods

Forms of contraception that physically block sperm from reaching an egg, such as condoms or diaphragms.

Diaphragm

A dome-shaped, flexible barrier that covers the cervix to prevent sperm from entering the uterus, used as a contraceptive method.

Birth Control Shot

An injectable, hormonal method of birth control that is used to prevent pregnancy for 12 weeks.

Implanon

A brand of contraceptive implant that releases a hormone to prevent pregnancy, inserted under the skin of a woman's upper arm.