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What does a short wave length indicate?

  1. High frequency

  2. Low intensity

  3. High melanin absorption

  4. Low frequency

The correct answer is: High frequency

A short wave length indicates that the frequency of the wave is high. This means it has a high number of cycles in a given amount of time, resulting in more energy being transmitted per second. Option B, low intensity, is incorrect because the intensity of a wave is determined by its amplitude, not its frequency. Option C, high melanin absorption, is incorrect because the absorption of a wave depends on its wavelength, not its frequency. Lastly, option D, low frequency, is incorrect because a short wavelength indicates a high frequency, not a low one.