An Iron Stove, Used for Heating a Room by Radiation

question 67

Multiple Choice

An iron stove, used for heating a room by radiation, is more efficient if:

• A)its inner surface is highly polished
• B)its inner surface is covered with aluminum paint
• C)its outer surface is covered with aluminum paint
• D)its outer surface is rough and black
• E)its outer surface is highly polished

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Definitions:

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50 percent of the time, a concept fundamental in sensory and perception studies.

Difference Threshold

The minimum difference in stimulation that a person can detect 50 percent of the time.

Relative Magnitude

The comparison of the size, extent, or importance of something in relation to another.

Difference Threshold

The least variation in stimulation that an individual is able to recognize 50% of the occasions, commonly termed as the just noticeable difference (JND).