What Is the F-Number of a Camera Lens That Has

question 22

Multiple Choice

What is the f-number of a camera lens that has an aperture-opening diameter of 0.20 cm and a focal length of 3.0 cm?

• A) 10
• B) 0.10
• C) 15
• D) 0.80

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Definitions:

Variable Costs

Variable costs are expenses that change in proportion to the activity of a business, such as sales volume or production levels.

Operating Income

The profit realized from a business's core operational activities, excluding deductions of interest and tax.

Unit Selling Price

The amount of money charged for each individual unit of a product or service.

Contribution Margin Ratio

A financial ratio that measures the profitability of a product by subtracting variable costs from sales and dividing the result by total sales.