Satellite communications involves four steps:

Satellites communicate by using radio waves to send signals to the antennas on the Earth. The antennas then capture those signals and process the information coming from those signals.

infrared

1. An uplink Earth station or other ground equipment transmits the desired signal to the satellite.
2. The satellite amplifies the incoming signal and changes the frequency.
3. The satellite transmits the signal back to Earth.
4. The ground equipment receives the signal.

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.

The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

electric and magnetic fields

In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays.

Examples of EM radiation include radio waves and microwaves, as well as infrared, ultraviolet, gamma, and x-rays. Some sources of EM radiation include sources in the cosmos (e.g., the sun and stars), radioactive elements, and manufactured devices.

The energy stored in a magnetic field is equal to the work needed to produce a current through the inductor. Energy is stored in a magnetic field.

The most important source of electromagnetic waves on Earth is the sun. Electromagnetic waves travel from the sun to Earth across space and provide virtually all the energy that supports life on our planet.

The energy of an electric field results from the excitation of the space permeated by the electric field. It can be thought of as the potential energy that would be imparted on a point charge placed in the field.

The electromagnetic wave which carries more energy than the others is the gamma wave or sometimes called as gamma rays. Gamma-rays fall above soft X-rays into the range of the electromagnetic spectrum.

Gamma rays have the highest energies and shortest wavelengths on the electromagnetic spectrum.

Based on the electromagnetic spectrum, Infrared and Ultraviolet rays lies at the end of the visible spectrum or visible light.

Answer. Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. 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.

15. EMR has very beneficial uses of our daily life to make it more comfortable and easier. Nowadays, we can talk to anyone on a mobile phone through the Internet: it is because of EMR, since these waves can transmit signals for very long distanc- es. So EMR has the key roles in making our lives more comfortable.

Effects on general health Reported symptoms include headaches, anxiety, suicide and depression, nausea, fatigue and loss of libido. To date, scientific evidence does not support a link between these symptoms and exposure to electromagnetic fields.

The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the human body absorbs RF energy most efficiently when the whole body is exposed.

Staying inside will reduce your exposure to radiation.

• Close windows and doors.
• Take a shower or wipe exposed parts of your body with a damp cloth.
• Drink bottled water and eat food in sealed containers.

Unlike high-energy (ionizing) radiation, EMFs in the non-ionizing part of the electromagnetic spectrum cannot damage DNA or cells directly. Some scientists have speculated that ELF-EMFs could cause cancer through other mechanisms, such as by reducing levels of the hormone melatonin.

Some individuals have reported a wide range of non-specific health problems that they attribute to low-level exposure of electromagnetic fields (EMF). The symptoms most commonly reported include headaches, body pain, lethargy, tinnitus (ringing in the ear), nausea, burning sensation, heart arrhythmia and anxiety.

No known health effects are expected if your exposure to EMF falls below the levels in the following guidelines: natural electromagnetic fields (like those created by the sun): 200 V/m. power mains (not close to power lines): 100 V/m. power mains (close to power lines): 10,000 V/m. electric trains and trams: 300 V/m.

Here are the 5 best methods to block EMF radiations!

1. Use an EMF Radiation Shielding Case, Cover, or Headphones with Electronic Devices.
2. Distance Yourself from Electronic Devices.
3. Turn Off Wi-Fi.
4. Enclose the Smart Meter on Your Home.
5. Create and Reinforce a “Device-Free” Area in Your Home.

Typical materials used for electromagnetic shielding include sheet metal, metal screen, and metal foam. Common sheet metals for shielding include copper, brass, nickel, silver, steel, and tin.

To reduce EMF pollution in your home and your neighborhood, turn off your Wi-Fi whenever you are not using it. Simply put your wireless router on a power strip. When you get up from your computer for a while, and especially when you go to bed, just turn it off.

The Himalayan salt lamp in the house or office helps by generating negative ions that cancel the positive ions generated by home appliances, computers, phones, wireless networks and other sources of EMF. As a result, they neutralize harmful electromagnetic radiation and other high-frequency radio waves.

Authentic lamps aren’t shiny and their glow is soft and muted. Shiny-surfaced lamps that emit a bright shine are probably not made of Himalayan salt. Because they’re made of salt, authentic lamps can chip or break if you drop them. Fake lamps are more resistant to damage.

A: Although there is no lethal danger in licking a salt lamp, as it is not toxic. We do not recommend it since the lamps usually accumulate dirt and pollutants both during transport as well as from their natural purifying process.

Himalayan Salt Lamp will last indefinitely if you take good care of it. Here is how to take care of your lamps. Himalayan Salt Lamps do tend to ‘sweat’ especially in climates that has more moisture in the air.