P1c

P1c

1. Electromagnetic waves travel in straight lines.

2. Electromagnetic Spectrum

   • Gamma
     • X-Ray
       • UV
         • Light
           • Infrared
             • Microwaves
               • Radiowaves

3. If wavelength increases then frequency decreases.

4. Reflection is when a wave changes direction by bouncing off a surface.

5. Refraction

   • Refraction is when a wave changes direction by entering a different material.
   • Refraction occurs because waves go at different speeds in different materials.

6. Diffraction

   • 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 wave length.