P1c

P1c

1. Facts

   • Electromagnetic waves travel in straight lines.
   • The EM spectrum in order of wavelength (from small to large) is: Gamma > X-Ray > UV > Light > Infrared > Microwaves > Radiowaves
   • If wavelength increases then frequency decreases.
   • Reflection is when a wave changes direction by bouncing off an surface.
   • Refraction is when a wave changes direction by entering a different material.
     • Refraction occurs because waves go at different speeds in different materials.
   • Diffraction is when waves spread out after going through a gap/opening.
     • Diffraction occurs the most when the gap is a similar size to the wavelength.

2. Processes

   • Use and manipulate the wave equation
     • Wave Speed = Frequency x Wavelength
   • Use standard form
     • 9.8 x 10 (to the power of) 3 = 9800
   • Draw ray diagrams to illustrate reflection and refraction
   • Label the main features of a transverse wave

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