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Radiant Energy

Radiant Energy. Radiant Energy. Radiant energy comes from the sun, or other stars. It reflects off objects like the Earth, Moon, Planets, and Satellites. Radiant energy is classified by its wavelength in a system called the electromagnetic spectrum. Electromagnetic Spectrum.

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Radiant Energy

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  1. Radiant Energy

  2. Radiant Energy • Radiant energy comes from the sun, or other stars. • It reflects off objects like the Earth, Moon, Planets, and Satellites. • Radiant energy is classified by its wavelength in a system called the electromagnetic spectrum.

  3. Electromagnetic Spectrum • The electromagnetic (E-M) spectrum includes 8 different types of E-M waves that travel through space. • AM/FM • TV • Microwaves • Infrared • Visible Light • Ultraviolet Light • X-Rays • Gamma Rays

  4. Arranged from left to right • Longest wavelength (Radio) to shortest wavelength (Gamma Rays). • Lowest frequencies (Radio) to highest frequencies (Gamma Rays).

  5. Visible light: • This is made up of the colors of the rainbow ROY G BIV • Refraction: Bending of light as it passes from one substance to another.

  6. - Telescopes Four Views of the Crab Nebula • Different type of telescopes collect electromagnetic radiation at different wavelengths. Astronomers are able to learn a great deal about the Crab Nebula by examining these different images. The images are shown at different scales.

  7. Spectroscopes • These scopes bend light reflected from an object into colors. • Spectroscopes are used to obtain information about stars • Chemical Composition • Each star has its own unique chemical composition, fingerprint. •  Each element absorbs different wavelengths, and each wavelength is recorded as a dark line on a spectrum.

  8. Temperature • Elements at different temperatures have different line spectrums. •  By comparing a star’s line spectrum with the known spectrums of elements at different temperatures we can infer how hot a star is.

  9. Star Spectrums • Astronomers use line spectrums to identify the chemical elements in a star. Each element produces a characteristic pattern of spectral lines.

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