Two Thin Lenses in Combination Are Placed in Contact with Each

question 39

Multiple Choice

Two thin lenses in combination are placed in contact with each other along a common axis.They have powers of 50 and -30 diopters,respectively.What is their combined power?

• A)10 diopters
• B)20 diopters
• C)80 diopters
• D)-10 diopters

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Definitions:

External Beam Radiation Therapy

A form of cancer treatment that uses beams of high-energy radiation to target and destroy cancer cells from outside the body.

Malignant Tumor

A term for a cancerous growth that is invasive, capable of spreading to other parts of the body, and potentially life-threatening.

Glandular Organ

An organ that produces and releases chemicals either through ducts or into the bloodstream.

ERT

Estrogen Replacement Therapy; a treatment used to alleviate symptoms of menopause by replenishing estrogen levels.