Camera: the Focal Length of a Thin Lens Is 40

question 82

Multiple Choice

Camera: The focal length of a thin lens is 40 mm and its aperture diameter is 10 mm. What is the f-number of this lens?

• A) f/4.0
• B) f/2.0
• C) f/5.6
• D) f/0.30
• E) f/0.40

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Definitions:

Alternative Use

Refers to the potential other uses or applications of an asset or resource outside its current employment.

Variable Cost

Costs that vary directly with the level of production or sales volume.

Total Costs

The complete aggregate of expenses incurred by a business, encompassing both fixed and variable costs.

Differential Revenue

The difference in revenue between two alternative decisions or scenarios.