Action spectrum

An action spectrum is like a picture that shows which colors of light help plants and animals do different things. Just like how people need different foods to stay healthy, plants and animals need different colors of light to grow and survive.

Scientists use special tools to measure how much different colors of light can make plants and animals do things like photosynthesis (making food) or move around. By looking at these measurements, scientists can make a map of which colors of light are best for different activities.

For example, some plants need a lot of red light to grow, while others need more blue light. And animals like humans can see best in yellow and green light. By understanding these action spectra, scientists can help farmers and scientists figure out the best ways to care for plants and animals.