"Electromagnetic spectrum" refers to the spectrum of electromagnetic radiation, and electromagnetic radiation is so named because it consists of electric and magnetic fields. In fact, light does affect charges and currents.
Radio waves are used for communications and radar. Microwaves are used to cook your food. Infrared waves are used in remote controls and are emitted from all warm objects, allowing them to be used to create heat-sensitive cameras.
Radio waves, microwaves and at least part of x-Rays do not pass through our body like you state. If radiation passes through a material, that either means that the material has no way of absorbing the energy in that radiation, or that the so-called cross-section is too small.
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.
They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays. Each region of this spectrum plays an important part in our lives, and in the business involving communication technology.
Infrared (IR) radiation – also referred to as thermal radiation – is the portion of the electromagnetic spectrum lying between visible light and microwaves. The most important natural source of infrared radiation is the sun.
Order is as follows (shortest to longest wavelength): Gamma, X-Rays, UV, Visible, Infrared, Microwaves, Radio Waves. Gamma has the shortest wavelength because it has a higher frequency, meaning more waves in a second than any other radiation, which results in the short wavelength.
They include:
- Radio Waves.
- TV waves.
- Radar waves.
- Heat (infrared radiation)
- Light.
- Ultraviolet Light (This is what causes Sunburns)
- X-rays (Just like the kind you get at the doctor's office)
- Short waves.
They all have things in common. In a vacuum, they all travel at the same speed - the speed of light - which is 3 × 108 m/s. They are all transverse waves, with the oscillations being electric and magnetic fields. Like all waves, they can be reflected, refracted and diffracted.
Scientists call them all electromagnetic radiation. The waves of energy are called electromagnetic (EM) because they have oscillating electric and magnetic fields. The photons are specific units, or packets, of energy. Sometimes those particles interact with each other and change the way the light originally behaved.
The most dangerous frequencies of electromagnetic energy are X-rays, gamma rays, ultraviolet light and microwaves. X-rays, gamma rays and UV light can damage living tissues, and microwaves can cook them.
Yes, humans give off radiation. Humans give off mostly infrared radiation, which is electromagnetic radiation with a frequency lower than visible light. This effect is not unique to humans. The sun is hot enough that most of its thermal radiation is emitted as visible light and near infrared waves.
Parts of the radio spectrum are used for radar and passive detection. Above the radio-frequency spectrum lies the infrared spectrum, followed by the visible range, which is quite narrow.
Detecting EM Waves. To detect the electric fields, use a conducting rod. The fields cause charges (generally electrons) to accelerate back and forth on the rod, creating a potential difference that oscillates at the frequency of the EM wave and with an amplitude proportional to the amplitude of the wave.
Instead “electricity” is the electromagnetic wave-energy: the EM fields which travel along wires at the speed of light.
The Electromagnetic spectrum lists the most powerful EMR, gamma rays, to the least powerful EMR, radio waves. In addition, the highest energy waves (gamma, x-ray) have the shortest wavelengths. The lowest energy waves, radio waves, have longest wavelengths.
The different types of electromagnetic radiation shown in the electromagnetic spectrum consists of radio waves, microwaves, infrared waves, visible light, ultraviolet radiation, X-rays, and gamma rays. The part of the electromagnetic spectrum that we are able to see is the visible light spectrum.
It depends on their properties. Like other waves, electromagnetic waves have properties of speed, wavelength, and frequency.
Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.
Different types of waves have a
different set of characteristics. Based on
the orientation of particle motion and direction of energy, there are three categories: Mechanical
waves. Electromagnetic
waves.
Electromagnetic Wave
- Microwaves.
- X-ray.
- Radio waves.
- Ultraviolet waves.
These are waves that consist of vibrating electric and magnetic fields. They transmit energy through matter or across space. Some electromagnetic waves are generally harmless. Like other waves, electromagnetic waves have properties of speed, wavelength, and frequency.
Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component. An electromagnetic wave transports its energy through a vacuum at a speed of 3.00 x 108 m/s (a speed value commonly represented by the symbol c).
