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Learn about spectrums, devices that split light into colors, and telescopes that make distant objects seem closer by collecting and focusing light, including optical and radio types. Discover how spectrums are measured and how they reveal the composition of stars.
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Spectrums & Telescopes Visible light – light that we can see Measured in wavelengths – distance between crest of one wave and the crest of the next wave Spectrums - the band of colors formed when light is split into its separate wavelengths. *A device that makes distant objects appear to be closer *They detect electromagnetic radiation – light or energy that can travel through space in the form of waves – many types
Spectrums are measured with a spectroscope - instrument that can disperse a beam of light into a spectrum of its component wavelengths. • Spectrums can also be broken apart with a prism. Two types of Spectrums • Continuous Spectrum – an unbroken band of color • Bright-line spectrum – shows the different chemical gases being emitted from a star. Each element has its own spectrum.
Two types of telescopes Optical – uses lenses or mirrors to collect and focus visible light Two types of optical telescopes • Refracting – uses convex lenses to gather and focus light • Reflecting – uses mirrors to collect and focus light • Radio – device that detects radio waves from objects in space ***Telescopes are housed in an observatory – a building that contains one or more telescopes***
