What is the transfer of energy by waves?
'Wave' is a common term for a number of different ways in which energy is transferred: In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels.
Electromagnetic waves are waves that consist of vibrating electric and magnetic fields. They transfer energy through matter or across space. The transfer of energy by electromagnetic waves is called electromagnetic radiation.
- Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is in the form of visible light. Light is made of waves of different frequencies.
- Light consists of packets of energy that stream constantly from the sun in all directions. These packets are called photons. Each photon is a discrete entity of electromagnetic radiation with a characteristic frequency of electromagnetic field vibration and a wavelength by Plant & Soil Science eLibrary.
- Mechanical waves and electromagnetic waves are two important ways that energy is transported in the world around us. Sound waves cannot travel in the vacuum of space because there is no medium to transmit these mechanical waves. Classical waves transfer energy without transporting matter through the medium.
The three types of solar radiation include: ultraviolet, visible, and infrared. Ultraviolet (UV) radiation is the type that gives people sunburns if they stay out in the sun without protection. The wavelengths are shorter than that of visible light, but longer than x-rays.
- The three types of solar radiation include: ultraviolet, visible, and infrared. Ultraviolet (UV) radiation is the type that gives people sunburns if they stay out in the sun without protection. The wavelengths are shorter than that of visible light, but longer than x-rays.
- They are also strongly linked to skin cancer. UVB rays, which affect skin's top layer, cause skin cancer and most sunburns. Although UVA and UVB rays pose the greatest risk for sun damage, people who work with welding torches or mercury lamps may be exposed to UVC rays, the most dangerous type of UV radiation.
- The earth radiates heat back to space mostly at much longer wavelengths than solar radiation (Fig. 2). When visible solar radiation reaches Earth, it may be absorbed by clouds, the atmosphere, or the planet's surface. Once absorbed it is transformed into heat energy, which raises Earth's surface temperature.
Conduction is the transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more.
- Heat refers to the energy transferred from a hotter object to a cooler one. Heat is transferred in three ways: radiation, conduction, and convection. Radiation is the direct transfer of energy.
- Temperature is the average amount of energy of motion in the molecules of a substance. It is a measure of how hot or cold a substance is. Temperature is one of the most important ele- ments of weather. Temperature is measured in units called degrees.
- ___ measures the total energy of the particles in a substance. The transfer of heat between two substances that are in direct contact is called ___.
Updated: 26th November 2019