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Light, Astronomical Observations, & the Sun

Terms in this set (30)

Electromagnetic radiation
Visible light constitutes only a small part of an array energy. Includes Gamma rays, X-rays, Ultraviolet light, Visible light, Infrared light, and Radio Waves. Described in two ways waves and stream of particles.
Spectroscopy
The study of the properties of light that depend on wavelength.
Continuous Spectrum
Produced by an incandescent solid, liquid, or high pressure gas.
Example: common light bulb
Absorption spectrum
Produced when white light is passed through a comparatively cool gas under low pressure.
Emission spectrum
Produced by a hot (incandescent) gas under low pressure
Doppler effect
The apparent change in wavelength of radiation emitted by an object caused by the relative motions of the source and the observer.
Refracting telescope
A telescope that uses convex lenses to gather and focus light
Reflecting telescope
A telescope that uses a concave mirror to focus the light.
Eyepiece
magnifies the image produced by the objective.
Corona
The very tenuous, outermost portion of the solar atmosphere.one of the four parts of the sun.
Spectroscope
is an instrument for directly viewing the spectrum of a light source.
Photosphere
The visible surface region of the Sun that radiates energy to space. Grainy texture made up of small bright markings called granuled prduced by convection. Temperature is about six-thousand degrees celcius.
Nuclear fusion
the source of the Sun's energy.
Photon
is ad discrete amount of electromagnetic energy that moces as a unit with the velocity of light.
Radio telescope
is designed to make observations using the radio wavelengths of electromagnetic radiation.
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