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10 Cards in this Set
- Front
- Back
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planet |
a celestial body moving in an elliptical orbit around a star. |
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radio telescope |
an instrument used to detect radio emissions from the sky, whether from natural celestial objects or from artificial satellites |
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radio wave |
an electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication. |
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reflecting telescope |
telescope that uses a converging lens to collect light. |
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space telescope |
n astronomical telescope that operates in space by remote control, to avoid interference by the earth's atmosphere. |
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spectrometer |
an apparatus used for recording and measuring spectra, especially as a method of analysis. |
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ultraviolet (UV) |
ultraviolet radiation definition. Radiation in the part of the electromagnetic spectrum where wavelengths are just shorter than those of ordinary, visible violet light but longer than those of x-rays. |
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visible light |
Visible light is a form of electromagnetic (EM) radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths that are visible to most human eyes. |
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wavelength |
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave. |
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X-ray |
Often, x-rays. a form of electromagnetic radiation, similar to light but of shorter wavelength and capable of penetrating solids and of ionizing gases. |
