The greenhouse effect is explained in terms of energy transformations and electromagnetic energy. Visible light enters the atmosphere, as it strikes earth some energy is transferred to the objects. Therefore the energy released into the atmosphere has less energy than the original visible light - it is now infrared energy. This infrared energy cannot pass through the greenhouse gas layer as easily as visible light does, so the infrared energy gets trapped. The phet greenhouse gas animation is used to demonstrate the behavior of light and how it shifts from visible light into infrared. How does electromagnetic energy interact with greenhouse gases to create the greenhouse effect?