Suppose You Wanted to Start a Fire Using a Mirror

question 68

Multiple Choice

Suppose you wanted to start a fire using a mirror to focus sunlight.Which of the following statements is most accurate?

• A)It would be best to use a plane mirror.
• B)It would be best to use a convex mirror.
• C)It would be best to use a concave mirror,with the object to be ignited positioned at the center of curvature of the mirror.
• D)It would be best to use a concave mirror,with the object to be ignited positioned halfway between the mirror and its center of curvature.
• E)One cannot start a fire using a mirror,since mirrors form only virtual images.

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Definitions:

Variability

A statistical measure that expresses the degree of dispersion or spread in a data set, indicative of how much individuals within the set differ.

Symmetry

A property of shapes or designs where one half is a mirror image of the other half.

Bimodal

Describing a distribution that has two different modes or peaks in its frequency of occurrence.

Frequency

The number of times an event occurs within a given data set.