The lights of the Sun
Rainbow of the wavelengths
|Updated September 17, 2014
The Sun emits a plurality of electromagnetic waves, to far ultraviolet (FUV) such as gamma rays (higher frequencies) to radio waves (lower frequencies), through X-rays, ultraviolet rays, visible light, infrared radiation, microwaves. These electromagnetic waves, whose vector is the photon, move at speed of ≈300000 km/s. With our eyes, we see only the wavelengths in the visible range between 400 and 800 nm, but when it comes to shorter or longer wavelengths, we need to use specialized devices. Specialized instruments are usually ground or space telescopes equipped observing light in different wavelengths.
The telescopes make use of this valuable information wavelength by embarking instruments such as spectrometers who observe several wavelengths simultaneously and measure the quantity of present elements to each wavelength.
Image: this composition exhibits various aspects of the surface or the atmosphere of the Sun into 10 different wavelengths, invisible to the naked eye. These special lights sun is converted and colorful by the telescope SDO (Solar Dynamics Observatory) so that humans can see them. The observed object here the Sun appears in a beautiful "rainbow sky" colors representing the light of the Sun. More the temperature is higher, more the dominant color moves towards microwaves to gamma waves. The yellow light has a wavelength of ≈580 nm, it is typically from about atoms, heated to about 5700 ° C, which is the case of the surface of the Sun. Extreme deep ultraviolet lights such as gamma waves have a wavelength of ≈9 nm, it is usually colorized green in the SDO images, it usually comes from the atoms heated to about 6,300,000 ° C which is the case of solar eruptions which can reach temperatures as high. Credit: NASA / SDO / Goddard Space Flight Center
The wavelengths of the Sun
The telescopes can collect light in ranges of frequencies inaccessible to us.
Video: Sun characteristics appear radically different when viewed in different wavelengths.
NB: Between the wavelength (λ) and frequency (ν) is the following relationship: ν = c / λ
ν = wave frequency in hertz
c = speed of light in vacuum in m / s
λ = wavelength in meter
The different layers of the Sun
Core of the Sun is the zone where the nuclear reactions occurs (fusion of hydrogen atoms). At the center of the Sun the temperature reaches about 15 million degrees and pressure 22,100 billion Pascals (Pa). By comparison the pressure of Earth's atmosphere varies around 100,000 Pa.
Photosphere 160 km thick is only responsible for the emission of energy that bathes the planet, it spotted granules.