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Question of the Day

Question of the Day. Question: What do you think stars are made of? Answer: … … …. Turn In: Computer lab (if p . 1 is finished) Travel Time to the Stars. The Electromagnetic Spectrum. f. Radio Waves. Uses: AM/FM, TV and shortwave radio, Satellite TV and GPS

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Question of the Day

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  1. Question of the Day Question: What do you think stars are made of? Answer: … … … • Turn In: • Computer lab (if p. 1 is finished) • Travel Time to the Stars

  2. The Electromagnetic Spectrum

  3. f

  4. Radio Waves • Uses: AM/FM, TV and shortwave radio, Satellite TV and GPS • Energy: Low energy can penetrate body without harm • Wavelength: Long wavelengths (kilometers to meters)

  5. f

  6. Microwave • Microwaves make molecules “dance”, which makes friction and heat. This cooks food from the inside out. • Wavelengths of 185 – 10 mm

  7. f

  8. Infrared • Detected as heat – used to cook food from the outside in. • Wavelengths of 1 mm - 750 nm

  9. Infrared

  10. f

  11. Visible Light • Range of energy observable by human eye • Wavelengths of 750 – 400 nm

  12. ROY G BIV

  13. f

  14. Ultraviolet (UV) • Wavelengths of 400 nm - 10 nm • Harmful to skin and eyes • Portion of spectrum that causes sun tan and sun burn

  15. f

  16. X-rays • Wavelengths of 10 nm or less • Produced when electrons suddenly decelerate (slow down) • Used in bone imaging

  17. f

  18. Gamma Rays • Energy produced from radioactive decay of an atom • Wavelengths typically < 10-12 m • Ionizing radiation which can result in genetic mutations and cancer – can also be used to treat cancer

  19. Spectroscopy • Spectroscopy- the study of molecular structure and dynamics through the absorption, emission, and scattering of light

  20. Spectroscopy • Spectroscopy- the study of molecular structure and dynamics through the absorption, emission, and scattering of light

  21. Sample Spectra

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