MCQ Detailed View

The stratosphere is an important layer of Earth's atmosphere located above the troposphere and below the mesosphere. One of its key functions is to absorb most of the ultraviolet (UV) radiation that comes from the Sun.

This absorption happens mainly because the stratosphere contains the ozone layer, a region rich in ozone gas (O₃). Ozone molecules are very effective at absorbing harmful UV rays, especially the most dangerous types like UV-B and UV-C. By absorbing this radiation, the stratosphere protects living organisms on Earth from the damaging effects of ultraviolet light, such as skin cancer and genetic mutations.

Unlike infrared radiation, which is mainly absorbed by greenhouse gases in the lower atmosphere, or radio waves that mostly travel through the atmosphere with little absorption, ultraviolet radiation is specifically blocked by ozone in the stratosphere.

This protective role of the stratosphere makes it essential for life on Earth. Without it, the Sun's ultraviolet radiation would reach the surface in much higher amounts, causing severe harm to ecosystems and human health.

The study of the stratosphere and its ozone layer is a crucial part of atmospheric physics and environmental science. It helps us understand not only Earth's protective systems but also the effects of human activities like pollution and ozone depletion.

Understanding the stratosphere’s function is vital for students learning about Earth's atmosphere and how it interacts with solar energy.