Fill in the blanks with the appropriate region of electromagnetic radiation: UV, visible, infrared. (a) The Sun most strongly emits in the _____ and regions of electromagnetic radiation (b) The atmosphere filters out biologically damaging ______ radiation from incoming solar radiation and prevents it from reaching Earth. (c) The Earth most strongly emits ______ radiation. (d) Greenhouse gases absorb _______ radiation.

Verified step by step guidance

1. (a) To determine the region of electromagnetic radiation where the Sun most strongly emits, consider the Sun's emission spectrum, which peaks in the visible region. Therefore, the Sun most strongly emits in the visible and ultraviolet (UV) regions.
2. (b) The atmosphere plays a crucial role in protecting life on Earth by filtering out harmful radiation. The biologically damaging radiation that the atmosphere filters out is ultraviolet (UV) radiation.
3. (c) The Earth emits radiation as a result of absorbing energy from the Sun. This emission is primarily in the infrared region, as the Earth is much cooler than the Sun and emits longer wavelengths.
4. (d) Greenhouse gases are known for their ability to absorb and re-emit infrared radiation, which contributes to the greenhouse effect and warming of the Earth's surface.

Key Concepts

Electromagnetic Spectrum

The electromagnetic spectrum encompasses all types of electromagnetic radiation, arranged by wavelength. It includes gamma rays, X-rays, ultraviolet (UV), visible light, infrared (IR), microwaves, and radio waves. Each type of radiation has distinct properties and interactions with matter, which are crucial for understanding phenomena such as solar radiation and Earth's energy balance.

Solar Radiation

Solar radiation refers to the energy emitted by the Sun, primarily in the form of visible light, ultraviolet (UV), and infrared (IR) radiation. The Sun's peak emission occurs in the visible range, which is essential for photosynthesis and influences climate. Understanding the composition of solar radiation helps explain its effects on the Earth's atmosphere and surface.

Greenhouse Effect

The greenhouse effect is a natural process where certain gases in the Earth's atmosphere, known as greenhouse gases, trap heat. These gases absorb and re-radiate infrared radiation emitted by the Earth, preventing it from escaping into space. This process is vital for maintaining the planet's temperature but can be intensified by human activities, leading to climate change.