A Camera Has a Converging Lens with a Focal Length

question 39

Multiple Choice

A camera has a converging lens with a focal length of 56 mm. If the f-number is 2.8, what is the diameter of the lens (in mm) ?

• A) 10
• B) 31
• C) 0.50
• D) 20
• E) 50

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Definitions:

Resource Management

The strategic planning, allocation, and utilization of resources such as water, land, and energy in an efficient, sustainable, and responsible manner.

Forestry

The science and craft of creating, managing, using, and conserving forests and associated resources for human and environmental benefits.

Selective Cutting

A forestry practice where only certain trees are cut down, allowing for a mix of tree ages and types to remain, promoting a healthier forest.

Uneven-aged Stand

A forestry term referring to a forest, woodland, or stand of trees that has trees of mixed ages within it, which can enhance biodiversity and resilience.