A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide. Because the spaceship will be too far from the sun for photosynthesis, an artificial light source will be needed.
-A gardener is concerned that her greenhouse is getting too hot from too much light, and seeks to shade her plants with colored translucent plastic sheets, the color of which allows passage of only that wavelength. What color should she use to reduce overall light energy, but still maximize plant growth?

Question

Quizplus · Accepted Answer

Plants primarily use blue and red wavelengths for photosynthesis. Using blue translucent sheets will allow the passage of blue light, which is crucial for plant growth, while reducing overall light energy.

A Spaceship Is Designed to Support Animal Life for a Multiyear