The Approximate Visual Angle of the Width of Your Thumb

question 26

Multiple Choice

 The approximate visual angle of the width of your thumb held at arm's length is _____ degrees.

• A) 0.5
• B) 2.0
• C) 4.7
• D) 11.5

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Definitions:

Color

The characteristic of visual perception described through hue, saturation, and brightness.

Hematite

An iron oxide mineral with a metallic luster and reddish-brown streak, commonly used as an ore of iron.

Magnetite

A magnetic mineral form of iron(II,III) oxide, often found in igneous and metamorphic rocks.

Quartz

A hard, crystalline mineral composed of silicon dioxide, widely used in jewelry and as an industrial abrasive.