Electromagnetic Waves in Electromagnetic Spectrum
Radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, gamma rays, and cosmic rays make up the full range (electromagnetic spectrum) in decreasing order of frequency and rising order of wavelength.
- The rapid travel of charged particles across conducting wires causes these waves.
- Radio, television, and telecom signals are transmitted through them.
- These waves have a frequency range of around 3kHz to 300MHz.
- In the ultrahigh-frequency (UHF) band, cellular phones employ radio waves to convey voice communication.
- Radio picks up radio waves that are broadcast by radio stations. Radio waves can be emitted by gases and stars in space. The majority of radio waves are used for TV and mobile communication.
- Microwaves are a type of electromagnetic radiation that has a frequency of a few gigahertz (GHz).
- Klystrons, magnetrons, and Gunn diodes are unique vacuum tubes that produce them.
- Microwaves are commonly utilised in aviation navigation due to their short wavelengths.
- These rays are employed in microwaves, which aid in the heating of meals in homes and offices. It’s also used by astronomers to figure out and understand the structure of surrounding galaxies and stars.
Infrared Rays
- Infrared waves are produced by hot bodies and molecules and are thus referred to as heatwaves.
- Infrared rays are near the low-frequency or long-wavelength end of the visible light spectrum.
- The greenhouse effect caused by these rays is critical for maintaining global warming and average temperatures.
- Greenhouse gases such as carbon dioxide and water vapour trap these radiations in the earth’s atmosphere.
- Night vision goggles make use of these radiations. Infrared light generated by objects in the dark can be read and captured by these devices. Infrared light is used to trace interstellar dust in space. Infrared radiation is emitted by electronic devices and is commonly employed in remote switches for a variety of household gadgets.
Visible Rays
- Visible rays are electromagnetic waves that can be seen with the naked eye. They are the most common type of electromagnetic waves.
- These can be found in the frequency range of 4×1014Hz–7×1014Hz or the wavelength range of 400nm–700nm.
- The visible light rays reflected or released from the objects around us assist us in seeing the world, and the range of visible radiation is different for different creatures.
- Devices that emit light in the visible area of the electromagnetic spectrum include bulbs, lamps, candles, LEDs, tube lights, and so on.
Ultraviolet Rays
- Although the sun is the primary source of ultraviolet radiation on Earth, the ozone layer absorbs the majority of UV energy before it reaches the atmosphere.
- UV radiation has a wavelength of 400nm–1nm.
- These radiations are emitted by special lamps and extremely hot bodies, and in big numbers, they can cause significant injury to humans. It tans the skin and creates burns.
- Because these radiations may be focused on tiny beams, they are used in high precision applications such as LASIK or laser-based eye surgery.
- UV lamps are used in water purifiers to eliminate microorganisms that may be present in the water.
- When working with UV welding arcs, welders use special goggles to protect their eyes.
- This electromagnetic radiation is found outside of the ultraviolet (UV) region of the electromagnetic spectrum and is extremely valuable in the medical field.
- The wavelength range of X-ray radiation is 1nm–10–3nm.
- By blasting a metal target with high-energy electrons, X-rays can be produced.
- X-rays are a diagnostic technique in medicine that can be quite helpful in the treatment of some types of cancer. To find the source of the problem, a doctor utilises an x-ray scanner to scan our bones or teeth. Overexposure to x-rays can cause harm or death to the organism’s healthy tissues. As a result, extreme caution must be exercised when dealing with x-rays.
- At the airport checkpoint, security agents utilise it to search through passengers’ luggage. X-rays are also emitted by the universe’s heated gases.
Gamma-Rays
- The universe is the largest gamma-ray generator.
- These rays are in the electromagnetic spectrum‘s higher frequency region.
- Gamma rays have wavelengths ranging from 10–12m to 10–14m.
- Radioactive nuclei release high-frequency radiations, which are also created during nuclear processes.
- Gamma rays have a wide range of medical applications, including the destruction of cancerous cells. Gamma-ray imaging is a technique used by doctors to examine the insides of patients’ bodies.
Electromagnetic Spectrum
Electromagnetic Spectrum: The sun is our planet’s principal source of energy, and its energy travels in the form of electromagnetic radiation. Electromagnetic energy moves across space at the speed of light in the form of waves of electric and magnetic fields with a range of frequencies or wavelengths.
Electromagnetic radiation is a common occurrence in our daily lives. All electromagnetic waves, from visible light, that our eyes can detect to microwave radiation that heats our meals or radio waves that power our radios, X-rays that enable doctors to identify any injury in our bones, or UV radiation emitted by a hot surface, are EM waves.
In this article, we have provided all types of electromagnetic radiation in the Electromagnetic Spectrum, their properties, diagrams, and applications of Electromagnetic Spectrum.
Table of Content
- What is an Electromagnetic Spectrum?
- Electromagnetic Waves
- Representation of Electromagnetic Waves
- Electromagnetic Spectrum
- Terms Related to Electromagnetic Waves
- Electromagnetic Waves in Electromagnetic Spectrum
- Radio Waves
- Microwaves
- Infrared Rays
- Visible Rays
- Ultraviolet Rays
- X-Rays
- Gamma-Rays
- Electromagnetic Spectrum Wavelength and Frequency Table
- Spectroscopy
- Applications / Uses of Electromagnetic Spectrum
- Electromagnetic Spectrum – Sample Questions