What type of electromagnetic waves can snakes detect that humans cannot?

• A. a lower frequency and a shorter wavelength
• B. a higher frequency and a longer wavelength
• C. a lower frequency and a longer wavelength
• D. a higher frequency and a shorter wavelength

Answer: (C)

Snakes are capable of detecting infrared radiation, which is categorized as a type of electromagnetic wave that has a lower frequency and a longer wavelength than visible light. This allows snakes to sense heat emitted by warm-blooded animals, aiding them in hunting and navigating their environment.

Infrared waves fall just outside the visible spectrum, making them imperceptible to humans, who primarily see wavelengths ranging from about 400 to 700 nanometers. In contrast, infrared radiation typically ranges from about 700 nanometers up to 1 millimeter, placing it at a longer wavelength and lower frequency than visible light.

Thus, the ability of snakes to detect these longer wavelength waves gives them a distinct advantage in their ecological niche, allowing them to respond to stimuli that are entirely outside the perception of humans.