Electromagnetic Radiation

Radiation itself does not have any feeling as it is invisible and odorless. However, prolonged exposure to high levels of radiation can cause various health issues including burns, radiation sickness, and an increased risk of developing cancer. It is important to take precautions and limit exposure to radiation sources.

The length of a shadow is primarily determined by the angle of the sun in relation to the object casting the shadow. Shadows are longer in the early morning and late afternoon when the sun is lower in the sky, and shorter at midday when the sun is directly overhead. The size and shape of the object casting the shadow also play a role in determining shadow length.

electromagnetic spectrum, which includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. These waves represent different regions of the spectrum based on their wavelengths and frequencies.

Alpha radiation consists of physical particles ... helium nuclei ...with relatively

low energy. Beta radiation consists of a stream of electrons ... much smaller

than alpha particles. Gamma rays are electromagnetic ... the electromagnetic

rays with the highest frequency, the shortest wavelength, and the greatest

energy.

Light in the range of 390-700 nanometers (roughly 430-790 terahertz) is visible to most humans. This is in the top third of the EM spectrum roughly between the near ultraviolet and near infrared range.

So, the nonvisible portion of the spectrum is comprised of gamma rays, x-rays, extreme ultraviolet, most of the near infrared range, mid and full infrared, EHF, SHF, UHF, VHF, HF, MF, LF, VLF, voice frequency, SLF, and VLF.

Only the sun emits radiation in the wavelengths of visible light, which is considerably higher energy than infrared emitted by Earth.

Oxygen is the element which, in the allotropic form known as ozone, absorbs UV rays from the sun. Off course, lots of other elements will do so. UV radiation does not penetrate lead, iron, zinc, etc. But those elements are not found in the atmosphere. It's the ozone that matters.

One high energy electromagnetic wave is gamma rays. Gamma rays have the shortest wavelengths and highest frequencies of all types of electromagnetic radiation. They are produced by nuclear reactions and radioactive decay processes.

At this time in medical research, no effects of radiation have been noted due to medical ultrasound. Biological effects have been seen, but these are almost exclusively caused purposely in labratories designed with the sole intent of testing these effects. The current equipment and regulations will not allow biological destruction of human tissue.

For any wave:

wavelength x frequency = speed

Speed of light, in this case.

For any wave:

wavelength x frequency = speed

Speed of light, in this case.

For any wave:

wavelength x frequency = speed

Speed of light, in this case.

For any wave:

wavelength x frequency = speed

Speed of light, in this case.

Copper, monovalent: blue

Copper, divalent, in halides: blue-green

Copper, divalent, in non-halide compounds: green

An x-ray photon is a high-energy, electromagnetic wave particle that carries energy and can penetrate materials. When passing through an object, x-ray photons can be absorbed, scattered, or pass straight through, creating an image based on the material's density and thickness.

Infrared radiation is used by sensors to detect differences in temperature. Infrared sensors detect the thermal energy emitted by objects in the form of infrared radiation, which allows them to measure temperature variances without physical contact.

Frequency and energy are related by the following: E = hf where h is Planck's constant, E is the energy in J, and f is the frequency in Hz. Remember that the product of any wavelength and its frequency is equal to the speed of light.

types include (in order of increasing frequency and decreasing wavelength): radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays

The range of colors that makes up white light is called the visible light spectrum. This spectrum includes all the colors of the rainbow, from red to violet. Brightness refers to the intensity of light, not to the range of colors present.

-- seeing things

-- warming my hands by the fire

-- working on my tan

-- watching the 10:00 news on TV

-- re-heating the meat loaf

-- attacking certain types of tumors

-- taking a snapshot

-- getting a CT scan

-- getting an MRI

-- making a cellphone call

-- checking my e-mail from the other room

-- using my GPS in the car

-- using its headlights to see things at night

-- listening to NPR while I'm driving it

-- opening the garage without getting out of it

-- measuring trees with my laser rangefinder

-- getting checked out with dental or chest X-rays

-- playing outside with my RC car

-- walking around the house talking on the cordless phone

Electromagnetic waves are a combination of electric and magnetic fields that propagate through space. They carry energy and can vary in strength depending on factors like frequency and amplitude. On the other hand, "regular" magnetic waves may refer to static magnetic fields which do not propagate like waves. It is not accurate to compare the strength of electromagnetic waves with regular magnetic waves as they represent different phenomena.

Synchrotron radiation is produced when charged particles, such as electrons, are accelerated to near-light speeds and then forced to change direction. This acceleration and change in direction cause the particles to emit electromagnetic radiation in the form of synchrotron light. This radiation is highly intense and covers a wide range of wavelengths, making synchrotron facilities valuable tools for various scientific research applications.

Electromagnetic waves are a result of oscillating electric and magnetic fields that travel through space at the speed of light. The varying frequencies of these waves determine their properties, ranging from low-energy radio waves to high-energy gamma rays.

See the Wikipedia article 'Ionising Radiation' of which this is the introduction. Ionizing radiation consists of subatomic particles or waves that are energetic enough to detach (ionize) electrons from atoms or molecules. Ionizing ability depends on the energy of the impinging individual particles or waves, and not on their number. A large flood of particles or waves will not cause ionization if these particles or waves do not carry enough energy to be ionizing. Examples of ionizing particles are energetic alpha particles, beta particles, and neutrons. The ability of electromagnetic waves (photons) to ionize an atom or molecule depends on their wavelength. Radiation on the short wavelength end of the electromagnetic spectrum - ultraviolet, x-rays, and gamma rays - is ionizing.

The size of the wavelengths in electromagnetic waves determines the type of wave and its properties. Shorter wavelengths correspond to higher frequencies and more energy, while longer wavelengths correspond to lower frequencies and less energy. The size of the wavelengths also affects how the waves interact with different materials and how they are used in various technologies.