Question

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 a lower frequency and a shorter wavelength. a higher frequency and a longer wavelength. a lower frequency and a longer wavelength. a higher frequency and a shorter wavelength.

Explanation:

The electromagnetic spectrum arranges waves based on frequency and wavelength. Infrared waves have lower frequencies and longer wavelengths compared to the visible - light waves that humans can see. In the electromagnetic spectrum, frequency and wavelength are inversely related ($c = \lambda
u$, where $c$ is the speed of light, $\lambda$ is wavelength, and $
u$ is frequency). Since infrared is below the visible - light region in terms of frequency, it has a lower frequency and a longer wavelength.

Answer:

C. a lower frequency and a longer wavelength