Transcript of Elektromagnetisch spectrum. Elektromagnetisch spectrum. Elektromagnetisch spectrum. Microgolven Infrarood Zichtbaar licht. Het Elektromagnetisch spectrum; Vragen • Vraag 1 wie heeft de röntgenstraling ontdekt? • Vraag 2 hoeveel Nobelprijzen kreeg Marie Curie. A. ▻ Atmospheric absorption spectra (1 C, 49 F) Electromagnetic spectrum illustrations (2 C, 85 F) Infrared spectrum (8 C, 44 F).

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Leds sodium spectrum fr. Thermal effects, however, do not apply with regard to wireless applications as we currently use them because the radiation intensity is too low. In astronomy they are valuable for studying high-energy objects or regions, however as with X-rays this can only be done with telescopes outside the Earth’s atmosphere.

Pirard, ISSeP; applicable to absorbed spectruum. Unlike higher frequency waves such as infrared and light which are absorbed mainly at surfaces, microwaves can penetrate into materials and deposit their energy below the surface. The first discovery of electromagnetic radiation other than visible light came inwhen William Herschel discovered infrared radiation.

Terahertz radiation is a region of the spectrum between far infrared and microwaves.

X-rays are useful as probes in high-energy physics. Eleltromagnetisch pages I-7 atmosphere and I for water. The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications.

The convention that EM radiation that is known to come from the nucleus, leektromagnetisch always called “gamma ray” radiation is the only convention that is universally respected, however.

Frequency Hopping Spread Spectrum. Although at the low end of the band the atmosphere is mainly transparent, at the upper end of the band absorption of microwaves by atmospheric gasses limits practical propagation distances to a few kilometers.

He noticed that the highest temperature was beyond red. Spectroscopes are widely used in astrophysics. Spectroscopy is used to study the interactions of electromagnetic waves with matter.

Yellow fluorescent light spectrum. Excitation of molecular and atomic valence electrons, including ejection of the electrons photoelectric effect.


Visible light and near-infrared light is typically absorbed and emitted by electrons in molecules and atoms that move from one energy level to another.

Until recently, the range was rarely studied and few sources existed for microwave energy at the high end of the band sub-millimeter waves or so-called terahertz wavesbut applications such as imaging and communications are now appearing.

Although they are emitted and absorbed by short antennas, they are also absorbed by polar moleculescoupling to vibrational and rotational modes, resulting in bulk heating. Analyzing the speed of these theoretical waves, Maxwell realized that they must travel at a speed that was about the known speed of light.

For example, Hertz was able to focus the waves using a lens made of tree resin. Ritter […] hypothesized that there must also be invisible radiation beyond the violet end of the spectrum and commenced experiments to confirm his speculation. These behaved similarly to visible violet light rays, but were beyond them in the spectrum. The ancient Greeks recognized that light traveled in straight lines and studied some of its properties, including reflection and refraction.

In reception of radio waves, the oscillating electric and magnetic fields of a radio wave couple to the electrons in an antenna, pushing them back and forth, creating oscillating currents which are applied to a radio receiver. UV rays in the middle range can irreparably damage the complex DNA molecules in the cells producing thymine elektromahnetisch making it a very potent mutagen.

Wi-Fi and health Wireless communication uses electromagnetic radiation. Until now, there have not been any indication substantiated by the scientific community that the radiation of wireless communication systems is harmful to health. Category Portal Index of color-related articles. Ritter initially referred to the new type of radiation as chemical rays, but the title of ultraviolet radiation apectrum became the preferred term. Generally, electromagnetic radiation is classified by wavelength soectrum radio wavemicrowaveterahertz or sub-millimeter radiation, infraredthe visible region that is elektgomagnetisch as light, ultravioletX-rays and gamma rays.

One notable use is diagnostic X-ray imaging in medicine a process known as radiography. Radiation of each frequency and wavelength or in each band has a mix of properties of the two regions of the spectrum that bound it.


In most of the frequency bands above, a technique called spectroscopy can be used to physically separate waves of different frequencies, producing a spectrum showing the constituent frequencies. Scientists are also looking to apply terahertz technology in the armed forces, where high-frequency waves might be directed at enemy troops to incapacitate their electronic equipment.

Electromagnetic spectrum

Color tool Monochromatic colors Complementary colors Analogous colors Achromatic colors Neutral Polychromatic colors Impossible colors Light-on-dark Tinctures in heraldry. Cool Epektromagnetisch Classroom activities. Retrieved from ” https: A—F List of colors: Research into the possible health impact of this radiation has been ongoing for many years. At most wavelengths, however, the information carried by electromagnetic radiation is not directly detected by human senses.

This page was last edited on 21 Octoberat A rainbow shows the optical visible part of the electromagnetic spectrum; infrared if it could be seen would be located just beyond the red side of the rainbow with ultraviolet appearing just beyond the violet end. These photons were from Lyman series transitions, putting them in the ultraviolet UV part of the electromagnetic spectrum.

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electromagnetic spectrum – Wiktionary

Electromagnetic radiation interacts with matter in different ways across the spectrum. UV is the longest wavelength radiation whose photons are energetic enough to ionize atoms, separating electrons from them, and thus causing chemical reactions.

X-rays are also emitted by the coronas of stars and are strongly emitted by some types of elektromagnetiscch. This value already sppectrum a safety factor of A schematic of how electromagnetic energy is attenuated as it goes from the sun source to a sensor after interaction with the Earth.

For example, many hydrogen atoms emit a radio wave photon that has a wavelength of EM Spectrum Properties reflected. However, due to their higher energies, X-rays can also interact with matter by means of the Compton effect.