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

question 32

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

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Definitions:

Endodermal Cells

Cells that make up the endoderm, the innermost layer of cells in early animal embryos, which eventually forms the lining of the digestive and respiratory systems.

Aquaporins

Protein channels in cell membranes that facilitate the transport of water and, in some cases, small solutes across the membrane.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy input usually in the form of ATP.

Primary Eudicot

A group within the angiosperms characterized by seeds with three protective coverings.