Download
radiant energy n.
Skip this Video
Loading SlideShow in 5 Seconds..
Radiant Energy PowerPoint Presentation
Download Presentation
Radiant Energy

Radiant Energy

1674 Vues Download Presentation
Télécharger la présentation

Radiant Energy

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  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.