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- electromagnetic radiation, in classical physics, the flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light, and gamma rays.
www.britannica.com/science/electromagnetic-radiation
You were introduced to two very popular equations concerning electromagnetic energy: the speed of light and the energy emitted from photons. Using the equations below, you will solve basic electromagnetic problems:
- Choose the correct answer: Is visible light a type of electromagnetic wave? YES. NO. Answer: a) YES. Explanation: Visible light is a part of the electromagnetic spectrum and is a type of electromagnetic wave.
- How are electromagnetic waves created? Electromagnetic waves are produced due to periodic changes in the electric or magnetic fields. The waves generated have synchronised oscillations of electric and magnetic fields.
- What is meant by the atmospheric window? The electromagnetic radiation with a certain wavelength that can pass through the Earth’s atmosphere is known as the atmospheric window.
- Choose YES or NO: Can electromagnetic waves travel through a vacuum? YES. No. Answer: a) YES. Explanation: Electromagnetic waves travel in a vacuum at the speed of light.
The space between the Earth and the Sun is largely empty, without any possibility of heat transfer by convection or conduction. In these examples, heat is transferred by radiation. That is, the hot body emits electromagnetic waves that are absorbed by our skin: no medium is required for electromagnetic waves to propagate. Different names are ...
- Gamma-Rays
- X-Rays
- Ultraviolet (UV) Rays
- Visible Light
- Infrared (IR) Rays
- Radio Waves
- Microwaves
Gamma rays have the highest frequency and photon energy in the electromagnetic spectrum. They have extremely short wavelengths and are associated with nuclear processes and high-energy particle interactions. Read More: Gamma Rays
X-rays have frequencies and photon energies slightly lower than gamma rays. They are widely used in medical imaging, security screening, and industrial applications due to their ability to penetrate materials and reveal internal structures. Read More: X-rays
Ultraviolet rays have higher frequencies and photon energies than visible light. They are emitted by the Sun and play a crucial role in biological processes, such as vitamin D synthesis and triggering chemical reactions in the atmosphere. Read More: Ultraviolet Rays
Visible light is the portion of the electromagnetic spectrum visible to the human eye. Visible light is essential for vision. It has a range of frequencies and photon energies that allow us to perceive different colours. Read More: Visible Light
Infrared rays have lower frequencies and photon energies than visible light. They are associated with thermal radiation and are commonly used in night vision, remote sensing, and infrared spectroscopy applications. Read More: Infrared Rays
Radio waves have the lowest frequencies and photon energies in the electromagnetic spectrum. They are used for communication, broadcasting, and radar systems. Different portions of the radio wave spectrum are allocated for various applications, including AM and FM radio, television, and mobile communication. Read More: Radio Waves
Microwaves have slightly higher frequencies and photon energies than radio waves. They are commonly used in microwave ovens, satellite communication, and wireless technologies. Read More: Microwaves Understanding the electromagnetic spectrum allows us to explore the diverse range of electromagnetic radiation and its applications.
Heat radiation (as opposed to particle radiation) is the transfer of internal energy in the form of electromagnetic waves — typically infrared or visible light.
The lowest frequency of electromagnetic radiation used for communication purposes is at 76 Hz. This lies in the extremely low frequency (ELF) part of the radio spectrum. Who uses this frequency and for what purpose?
People also ask
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What is electromagnetic radiation?
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How does a hot body emit electromagnetic waves?
Jan 30, 2023 · Electromagnetic radiation is a form of energy that is produced by oscillating electric and magnetic disturbance, or by the movement of electrically charged particles traveling through a vacuum or matter.
