A Person with Normal Eyesight Uses a Converging Lens of Focal

question 116

Multiple Choice

A person with normal eyesight uses a converging lens of focal length $10 \mathrm {~cm}$ as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. At what minimum distance from the job must he hold the lens?

• A) \(30 \mathrm {~cm}\)
• B) \(20 \mathrm {~cm}\)
• C) \(7.1 \mathrm {~cm}\)
• D) \(9.4 \mathrm {~cm}\)
• E) \(14 \mathrm {~cm}\)

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Definitions:

Malignant Neoplasm

A cancerous tumor that is invasive and can spread to other parts of the body.

Tumor Cell

A cell that has undergone mutation leading to uncontrolled growth, potentially forming a tumor.

Telomere

A region of repetitive nucleotide sequences at the end of a chromosome, protecting it from deterioration or fusion with neighboring chromosomes.

Noncoding DNA

Segments of DNA that do not code for proteins but have roles in regulating gene expression.