Tripling the Focal Length of a Telephoto Lens,while Holding Aperture

question 23

Multiple Choice

Tripling the focal length of a telephoto lens,while holding aperture size constant,will change the light intensity admitted to the film by what factor?

• A)0.11
• B)0.33
• C)3.0
• D)9.0
• E)​0.50

---

Definitions:

Blood Clot

A mass formed by the coagulation of blood in a part of the circulatory system, stopping bleeding or blocking a vessel.

Polycythemia Vera

A rare blood disorder characterized by an increased number of red blood cells, which can lead to an increased risk of blood clots, stroke, and heart attack.

Therapeutic Phlebotomy

A medical procedure that involves drawing blood from a patient to treat or manage various medical conditions.

Dizziness

A sensation of feeling unsteady, woozy, or having a sense of spinning, often related to issues in the inner ear or brain.