Here's why:
* The Atmosphere Acts as a Filter: The atmosphere is a layer of gases surrounding the Earth. It acts as a filter, allowing some forms of radiation to pass through while absorbing or reflecting others.
* Sunlight's Journey: The sun emits a wide range of radiation, including visible light, infrared radiation (heat), and ultraviolet radiation.
* Absorption and Reflection: Some of the sun's radiation is absorbed by gases in the atmosphere, like ozone which absorbs harmful UV radiation. Other parts of the radiation are reflected back into space by clouds or particles in the atmosphere.
* Reaching the Surface: The remaining radiation, including visible light and some infrared radiation, passes through the atmosphere and reaches the Earth's surface, providing us with warmth and light.
Important Note: The atmosphere plays a crucial role in regulating the Earth's temperature. It traps some heat, preventing the planet from becoming too cold, a phenomenon known as the greenhouse effect. However, human activities are increasing the amount of greenhouse gases in the atmosphere, leading to global warming.
