Nature of light

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Nature of light

  1. 1. OPTICS NATURE OF LIGHT learning activities of physics I Nengah Surata SMA N 1 Labuhan Ratu Indonesia
  2. 2. Light is a transverse wave. An electric field and a magnetic field change orthogonally to the direction of the light wave. The different Mechanical wave with Light wave a magnetic field electric field
  3. 3. Caracteristic of light 1. The radiation does not require a medium to propagate itself 2. It can travel through a vacuum and many other media. In a vacuum, the speed is a constant, c = 3.00 x 10 m/s. x 3. It will travel slower through different media.
  4. 4. the spectrum of light
  5. 5. Light waves with different frequencies will also have different wavelengths. The energy of the photons of light carry varies with frequency. Higher energy light has a higher frequency and a shorter wavelength. In the visible part of the spectrum, violet light has the highest energy and frequency and shortest wavelength.
  6. 6. Laser • A very useful application of light is a laser. A laser emits monochromatic light - light with only one frequency (colour). An incandescent light gives off light of many different frequencies. Laser light is also coherent (in phase). The peaks of each wave occur together to produce constructive interference. Incoherent light has no organization or pattern in the peaks of the waves
  7. 7. Lasers have many uses Medicine: very accurate cutting and cauterizing of cuts due to high energy at the incision. .
  8. 8. Information storage: bar code readers and laser discs use the properties of the reflection of the organized light to decode information
  9. 9. Industry: cutting and surveying.
  10. 10. Laser for other applications Fiber laser Other 18% 9% CO 22% Solid state 43%
  11. 11. . Produce most of the colors. emission devise absorption devise
  12. 12. True white light has equal amounts off the entire visible spectrum.

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