No, humans cannot see infrared (IR) light.
While the human eye is capable of perceiving light within the visible spectrum, infrared light falls outside this range. Infrared light has longer wavelengths and lower energy compared to visible light, making it undetectable by the photoreceptor cells in our eyes.
Think of the electromagnetic spectrum as a rainbow of different types of light. The visible spectrum is just a small slice of that rainbow. We can see the colors red, orange, yellow, green, blue, indigo, and violet. Infrared light is "below" red on the spectrum (hence the name "infra-red") and our eyes aren't equipped to see it.
However, it's worth noting that we can sometimes perceive infrared energy as heat. This is because infrared radiation can cause molecules to vibrate, which we experience as warmth.
Some animals, such as mosquitoes, vampire bats, bed bugs, and certain snake and beetle species, can detect infrared light and use it for vision, allowing them to sense heat signatures of prey or navigate in the dark.
In summary, while we can feel infrared radiation as heat, our eyes are not capable of directly seeing infrared light.
