Table of Contents
What is Electromagnetic Radiation?
Electromagnetic radiation is a type of energy that travels through the air and is made up of tiny particles called photons. Photons are created when an atom’s nucleus absorbs or releases energy.
Formula
for the Surface Area of a Sphere
The surface area of a sphere is the total area the sphere has when its surface is unfolded. The surface area of a sphere is pi*r^2, where r is the radius of the sphere.
c = λv
The speed of light in a vacuum is a constant, c. The wavelength of light is the distance between two adjacent peaks of the wave. The relationship between wavelength and speed is c = λv, where c is the speed of light, λ is the wavelength, and v is the speed.
Define Electromagnetic Spectrum
The electromagnetic spectrum is a range of all types of electromagnetic radiation, including radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
Properties of Electromagnetic Waves
The following are some properties of electromagnetic waves:
– Electromagnetic waves are composed of electric and magnetic fields that vibrate at right angles to each other and to the direction of propagation.
– Electromagnetic waves can travel through a vacuum and can pass through materials such as glass, air, and water.
– Electromagnetic waves are emitted by charged particles and can be detected using antennas.
– Electromagnetic waves have a range of frequencies and wavelengths that vary depending on the type of wave.
– Electromagnetic waves can be used to transmit information, including sound, pictures, and text.
Relation between Wavelength and Frequency
wavelength is inversely proportional to frequency.
Relation between Frequency and Energy
The frequency of a wave is inversely proportional to the wave’s energy. This means that as the frequency of a wave increases, the wave’s energy decreases, and vice versa.
Types of EMF Exposure
There are three primary types of EMF exposure:
1. Low Frequency EMF
Low frequency EMF is emitted from sources such as power lines, electrical wiring, and appliances. This type of EMF is typically undetectable to the human senses.
2. Radio Frequency EMF
Radio frequency EMF is emitted from sources such as cell phones, microwave ovens, and wireless routers. This type of EMF is typically detectable to the human senses as heat, although at high levels it can cause physical harm.
3. Electromagnetic Radiation
Electromagnetic radiation is a type of energy that travels through the air and is emitted from sources such as cell phones, satellites, and wireless networks. This type of EMF is typically detectable to the human senses as light.
Examples of High-Energy Radiation include:
-Gamma Rays
-X-Rays
-Ultraviolet Rays
-Visible Light
-Infrared Rays
-Microwaves
-Radio Waves
Electromagnetic Radiation Features:
-Electromagnetic radiation is energy that travels through the air or space as an electric and magnetic field.
-It is made up of invisible waves of energy that move at the speed of light.
-Electromagnetic radiation includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, and x-rays.
