What type of technology utilize radio waves?
They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys. (For a fuller treatment, see electromagnetic radiation: Radio waves.)
What does EMS mean in waves?
Definition: Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field.
Which type has the shortest wavelength?
Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum.
How big is a microwave wavelength?
What are microwaves? Microwaves are electromagnetic waves. Their frequencies (wavelengths) are in the range from 300 MHz (λ = 1 m) up to 300 GHz (λ = 1 mm).
What region of electromagnetic spectrum is often used by Internet service providers in fiber optic technology?
near-infrared region Optical fiber communication systems use carrier frequencies in the near-infrared region of the electromagnetic spectrum. The typical value of the optical carrier frequency ν is 193 THz for a wavelength in the 1550-nm range.
What is microwave application?
Applications of Microwave: To cook food as it cause water and fat molecules to vibrate, which makes the substances hot. Mobile phones use microwaves, as they can be generated by a small antenna. Wifi also uses microwaves. Fixed traffic speed cameras.
What is EMS massage?
Electrical muscle stimulation (EMS) is a type of electrotherapy stimulates a muscle contraction using electrical impulses in order strengthen weak muscles, reduce swelling, relieve pain and help heal wounds.
How is the wavelength of an EM wave related to energy apex?
Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies. Higher frequency waves have more energy. The speed of a wave is a product of its wavelength and frequency.
How is ultraviolet radiation different from visible light in terms of wavelength?
Ultraviolet (UV) light has shorter wavelengths than visible light. Although UV waves are invisible to the human eye, some insects, such as bumblebees, can see them.
Why is white not A color?
If color is solely the way physics describes it, the visible spectrum of light waves, then black and white are outcasts and don't count as true, physical colors. Colors like white and pink are not present in the spectrum because they are the result of our eyes' mixing wavelengths of light.
What is a micro oven?
Description. Microwave ovens heat food using microwaves, a form of electromagnetic radiation similar to radio waves. Microwaves have three characteristics that allow them to be used in cooking: they are reflected by metal; they pass through glass, paper, plastic, and similar materials; and they are absorbed by foods.
What is meant by infrared rays?
Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm). Infrared waves are longer than those of visible light, but shorter than those of radio waves.
How an optical Fibre is constructed and how is it helpful in transmitting the electromagnetic radiations?
The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.
Is fibre Broadband safe?
In summary, a fiber optic installation does not carry any risk in terms of electromagnetic radiation. Since such radiation does not occur in fiber optic transmission, there is also no evidence of its impact on human health through fiber optics.
Which of the following frequency bands fall under microwave frequency?
In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum. Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, Ku, K, or Ka band, or by similar NATO or EU designations.
What is an electromagnetic spectrum Class 12?
Electromagnetic spectrum is the classification of EM waves according to their frequency or wavelength. Based on the wavelength EM waves are classified into different categories. This classification is known as electromagnetic spectrum.
What is TENS massager?
A TENS machine is a small, battery-operated device that has leads connected to sticky pads called electrodes. Credit: You attach the pads directly to your skin. When the machine is switched on, small electrical impulses are delivered to the affected area of your body, which you feel as a tingling sensation.
Does EMS build muscle Reddit?
It should therefore follow that mass increase of a muscle should be identical, whether stimulated by a brain or an electrode… However, sources and studies consistently state that muscle mass increase from EMS is minimal at best, and does not compare to traditional exercise (for healthy adults).
How is the frequency of a specific color of light related to its intensity How about to its energy?
Just as wavelength and frequency are related to light, they are also related to energy. The shorter the wavelengths and higher the frequency corresponds with greater energy. So the longer the wavelengths and lower the frequency results in lower energy.
Which of the relationship will describe the wavelength frequency and energy in the electromagnetic spectrum?
The amount of energy carried in each quantum is proportional to the frequency of the radiation. As frequency and wavelength have an inversely proportional relationship, the energy quantum carried is inversely proportional to wavelength.
Why are ultraviolet rays used in sterilizing medical equipment Brainly?
Using Ultraviolet radiation is an effective method of sterilizing medical equipment. Radiation kills germs and pests that can cause disease.
Is black a color yes or no?
Some consider white to be a color, because white light comprises all hues on the visible light spectrum. And many do consider black to be a color, because you combine other pigments to create it on paper. But in a technical sense, black and white are not colors, they're shades.
Does color exist?
The first thing to remember is that colour does not actually exist… at least not in any literal sense. Apples and fire engines are not red, the sky and sea are not blue, and no person is objectively "black" or "white". What exists is light. Light is real.
How do you reheat food in Philips OTG?
Keep the bowl or pan in the middle rack of the preheated oven at 150 degree C and heat with the lower rod On for 15 to 20 minutes.
What is a fan convection oven?
A convection oven has a fan and exhaust system that helps circulate hot air around the cavity of the oven, helping to reduce hot and cool spots and for more even results with multi-rack cooking.
What is infrared computer network?
IR wireless is the use of wireless technology in devices or systems that convey data through infrared (IR) radiation. Infrared is electromagnetic energy at a wavelength or wavelengths somewhat longer than those of red light.
Which of the following devices uses a thermal imaging device technology to capture infrared light?
A thermographic camera (also called an infrared camera or thermal imaging camera, thermal camera or thermal imager) is a device that creates an image using infrared (IR) radiation, similar to a normal camera that forms an image using visible light.
What is optical fiber discuss optical fiber construction and propagation modes?
An optical fiber is a cylindrical dielectric waveguide (nonconducting waveguide) that transmits light along its axis through the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer, both of which are made of dielectric materials.
Is the range of signal frequencies within which a fiber optic component link or network will operate?
Typically 4% of the incident light. Expressed in dB relative to incident power. Backscattering: The scattering of light in a fiber back toward the source, used to make OTDR measurements. Bandwidth: The range of signal frequencies or bit rate within which a fiber optic component, link or network will operate.
What is fibre broadband UK?
Fibre broadband is a type of high-speed broadband. It uses fibre optic cables, which are better at transferring data than standard copper cables. And by data, we're talking online gaming and streaming movies and music. Basically, you can do all the things you love on the internet faster.