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Unit 2 – Optics

Vocabulary
amplitude, angle of incidence, angle of reflection, angle of refraction, blind spot, concave, converging,
convex, cornea, crest, diverging, electromagnetic radiation, energy, focal point, frequency, gamma rays,
infrared, iris, lens, microwaves, normal, opaque, optic nerve, pupil, radio waves, refraction, retina, sclera,
spectrum, translucent, transparent, trough, visible light, ultraviolet, wave, wavelength, X-rays

Behaviour of waves

  • define waves and describe their characteristics, using examplesand sketches
  • demonstrate wavelength, frequency, and amplitude, with corresponding explanations
  • describe how waves are reflected off a barrier and refracted when passing from one medium to another

Properties of visible light

Compare visible light to other types of electromagnetic radiation

  • differentiate radio waves, microwaves, infrared, visible light,ultraviolet, X-rays, and gamma rays in terms of wavelength, frequency, and energy transferred
  • relate different types of electromagnetic radiation to their daily lives

How human vision works

  • illustrate the parts of the eye, including sclera, cornea, retina, lens, optic nerve and blind spot, iris, and pupil
  • describe the cornea-lens-retina system
  • describe common defects in human vision (e.g., near-sighted, far-sighted)
  • describe several ways of correcting or extending human vision (e.g., contact lenses, laser surgery, binoculars)
  • identify similarities and differences between the eye and another optical system (e.g., microscopes, telescopes)
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