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

question 45

Multiple Choice

What is the f-number of a camera lens that has an aperture-opening diameter of 0.30 cm and a focal length of 6.0 cm?

• A)0.30
• B)1.8
• C)20
• D)6.0
• E)​0.05

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Definitions:

Coordinate System

A system for specifying the precise location of points in space using numbers, often represented on a graph as horizontal and vertical axes.

Points

An exact location in space, often represented in mathematics by coordinates.

Distance

The length between two points, often calculated using various formulas depending on the context, such as the distance formula in a coordinate plane.

Decimal Places

The number of digits to the right of the decimal point in a number.