A Person with Normal Eyesight Uses a Converging Lens of Focal

question 16

Multiple Choice

A person with normal eyesight uses a converging lens of focal length 10 cm. He holds the lens close to his eyes to finish an engraving job. What is the magnifying power of the lens?

• A) 3.5
• B) 4.5
• C) 6.5
• D) 7.5
• E) 8.5

---

Definitions:

Systolic Cycle

The phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries, raising arterial blood pressure.

Diastolic Cycle

The phase of the heart cycle during which the heart muscles relax and the chambers of the heart fill with blood.

Korotkoff Phase

Sounds heard over an artery when blood pressure is measured, used to identify systolic and diastolic pressures.

Rectal Temperature

A method of measuring body temperature by inserting a thermometer into the rectum, providing a highly accurate reflection of the body's core temperature.