wave properties 1

wave properties 1

1. reflection

   • straight waves directed at a certain angle to a hard flat surface
     • reflect off at the same angle
   • angle i = angle r
     • surface the same
     • direction same

2. diffraction

   • when waves spread out after passing through a gap or round an obstacle
   • narrower the gap, the more the waves are spread out
   • the longer the λ, the more the waves are spread out

3. refraction

   • wave pass across a boundary
     • the wave speed changes
       • the wavelength changes
     • at a non-zero angle to the boundary
       • change direction and speed
   • light waves travel more slowly in glass than in air

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