Electromagnetic Radiation

Depends what you mean by "useful."

UV light can cause chemical reactions to occur very rapidly, and is thus used in highly precise photo-engraving, such as in the making of micro-chips.

It is also useful in killing micro-organisms.

Who would be stuiped enough to think if plasma [salyva] will creat a magnetic field. the only person who could find out really if plasma produces a magnetic field is to test it out and experiment!

Visible light has a lower frequency than infrared radiation. Visible light ranges in frequency from approximately 430 THz (red light) to 750 THz (violet light), while infrared radiation has frequencies below 430 THz.

The smallest amount of energy that can be emitted or absorbed as electromagnetic radiation is a photon, which behaves like a particle carrying discrete energy. This minimum amount of energy is determined by the frequency of the radiation, according to Planck's equation E=hf, where E is energy, h is Planck's constant, and f is frequency.

No, a quantum is the smallest discrete unit of energy that can be emitted or absorbed in the form of electromagnetic radiation. It is a fundamental concept in quantum mechanics that explains the behavior of particles at the atomic and subatomic levels.

The higher the frequency, the greater the electromagnetic energy. High-frequency gamma rays are the most energetic form of radiation (and the most dangerous to human health), followed by X-rays, ultraviolet, visible light, infrared (heat), and finally radio waves.

Microwaves are actually a form of radio waves in the near-infrared. What makes them so apparently energetic (and therefore so useful) is that their particular frequency is great at making water molecules vibrate, which imparts heat energy directly into food in a process known as dielectric heating.

E=hv

Where E is energy

h is planks constant

v is the frequency of the EMr

Yes, infrared radiation is emitted by the glowing of firewood. When firewood undergoes combustion, it produces heat and light, including infrared radiation which is invisible to the human eye but can be felt as warmth on the skin.

Sunlight gives energy to the surface of earth, in other words, it warms the earth. Some is blocked by clouds and some is reflected away by large white masses of ice cap and glaciers.

Sunlight comes as light and heat, but not all of it reaches the earth. Ultra-violet light C, very dangerous to humans, is completely blocked by the ozone layer. Ultra-violet B, which causes sunburn and skin cancer is mostly blocked by the ozone layer. Most ultra-violet A light reaches the earth, where it does little damage.

The detector refers to the component that actually does the detecting.

The monitor is the detector plus all the other stuff that comes with it that lets people monitor the levels of radiation.

The gas in Earths atmosphere that absorbs UV radiation is Ozone in an area of the stratosphere called the ozone layer, 10-50km up.

Containing 3 Oxygen atoms compared to molecular (diatomic) oxygen that we breath with 2 oxygen molecules.

The electromagnetic spectrum commonly used in land surveys includes visible light, infrared, and microwave wavelengths. Visible light is used for traditional surveying methods like theodolites and total stations, while infrared and microwave wavelengths are utilized in techniques such as LiDAR (Light Detection and Ranging) and synthetic aperture radar (SAR) for remote sensing and mapping applications.

Ozone is the gas produced by ultraviolet radiation in the air near welding operations. Ultraviolet radiation can break down oxygen molecules in the air into oxygen atoms, which can then combine to form ozone. Ozone can be harmful to human health and the environment.

Microwave ovens work by making particles of water vibrate with energy, therefore producing the most common product of energy: heat. As the plastic is not made up of water particles, it does not heat up.

-- Gamma rays are harmful to living organisms because each gamma-ray photon

carries relatively high energy, and is capable of damaging cells.

-- You should be suspicious of whoever told you that microwave radiation is not

harmful to humans. Have you ever seen what 1,200 watts of RF at 2.5 GHz can do

to a hot dog in the 'microwave' oven ?

Normally you create vacuum by pumping out the air from a sealed container. Electric and magnetic fields would seldom be used, unless you had some electrically charged particles that you wanted to remove from your partial vacuum.

Depends on what TYPE of EM radiation. Also how much.

If the room is emitting infra-red radiation, that only means the room has a temperature.

If visible light, that only means you are not in the dark.

If low frequency radio waves, most likely nothing will happen.

Microwaves, ultra-violet light, and EM radiation of higher frequency can cause burns, damage to cells, and even death. But, in all cases (even gamma rays), it matters far more how MUCH of the radiation is being irradiated on you.

An optometrist needs to be an expert with light because understanding how light interacts with the eye is crucial for assessing vision and eye health. This knowledge helps in diagnosing conditions like cataracts, glaucoma, and macular degeneration, and in prescribing lenses or treatments to improve vision. Additionally, optometrists use specialized instruments that emit different types of light to examine the eye thoroughly.

Alpha particles and beta particles produce the least amount of scatter radiation compared to gamma rays or x-rays due to their larger size and lower energy. This makes them easier to shield against and reduces the risk of exposure to scatter radiation.

The most probable acute radiation syndrome subsyndrome with 400 RAD 2 hours after exposure is the hematopoietic subsyndrome, which affects the blood-forming tissues. At this dose and time frame, individuals may experience symptoms such as nausea, vomiting, and diarrhea.

When X-rays remove electrons from atoms, they are behaving as ionizing radiation. This means they have enough energy to remove electrons from atoms, creating charged particles (ions) that can interact with other atoms and molecules in the surrounding environment.

Since this a science question: we probably will never eliminate exposure to radiation. Besides the radiation we have caused, there is normal natural tradition. There is also something called background radiation which is part of our world.

Yes indeed they are ionizing radiation. Of particular importance to astronauts who are exposed to much more than those who are Earth bound. But even flight crew on high flying aircraft have to pay attention to this.

An electric cooker grill typically emits infrared radiation to cook food. This type of radiation heats the food by transferring energy through electromagnetic waves, similar to how the sun warms the Earth.

It's primary usage is to determine the nature of an induced EMF from changes in the magnetic flux through a circuit. However, you must use Faraday's Law (and a unit conversion factor) to determine the SIZE of such an EMF.