Infrared radiation is a type of electromagnetic radiation with longer wavelengths than those of visible light. It is invisible to the human eye, but it can be felt as heat. Infrared radiation is commonly used in various applications, such as thermal imaging, remote controls, and heat therapy.

Properties of Infrared Radiation

Wavelength: Infrared radiation has wavelengths ranging from about 700 nanometers to 1 millimeter, longer than those of visible light.
Heat Sensation: Although it is invisible, we can feel infrared radiation as heat when it is absorbed by our skin.
Thermal Imaging: Infrared radiation is used in thermal imaging cameras to detect heat signatures from objects and living organisms.
Remote Controls: Many remote control devices, such as those for TVs and air conditioners, use infrared radiation to transmit signals to the receiving device.
Medical Applications: Infrared radiation is used in heat therapy to treat muscle pain and promote healing.

Applications of Infrared Radiation

There are numerous applications of infrared radiation in various fields:

Security Systems: Infrared motion sensors are used in security systems to detect movement.
Communication: Infrared communication is used in some short-range wireless communication systems.
Astronomy: Infrared telescopes are used to observe celestial objects that are not visible in the visible spectrum.
Industrial Processes: Infrared radiation is used in industrial processes such as heating, drying, and curing of materials.
Environmental Monitoring: Infrared sensors are used to monitor environmental parameters such as temperature and humidity.

Study Guide

When studying infrared radiation, it's important to understand its properties, applications, and the ways in which it interacts with matter. Here are some key topics to focus on:

Define and describe the electromagnetic spectrum, highlighting the position of infrared radiation within the spectrum.
Explain the relationship between the wavelength of infrared radiation and its heat-sensing properties.
Discuss the various applications of infrared radiation, including thermal imaging, remote controls, and medical uses.
Explore the role of infrared radiation in specific fields such as astronomy, communication, and industrial processes.
Investigate the ways in which infrared radiation is detected and utilized in different technologies and devices.

Understanding these concepts will provide a solid foundation for comprehending the significance and applications of infrared radiation in the modern world.

◂Physics Worksheets and Study Guides High School. Thermodynamics

The resources above cover the following skills:

PHYSICAL SCIENCE (NGSS)

Matter and Its Interactions

Students who demonstrate understanding can:

Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.

Energy

Students who demonstrate understanding can:

Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.

Plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system results in a more uniform energy distribution among the components in the system (second law of thermodynamics).