Some snakes have special sensory organs that detect the infrared region of the electromagnetic spectrum. Compared with human vision, these snakes can sense electromagnetic waves that have

Infrared waves have a longer wavelength and a lower frequency than visible light, which is the range humans can see. Frequency and wavelength are inversely related, so a longer wavelength corresponds to a lower frequency. Therefore, these snakes sense waves with a lower frequency and a longer wavelength.

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