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Waves

Waves. S8P4 Overview. S8P4a. Identify the characteristics of electromagnetic and mechanical waves. Electromagnetic Waves- can travel through a medium or through a vacuum (empty space). Examples: light, radio waves, infrared, microwaves

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Waves

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  1. Waves S8P4 Overview

  2. S8P4a. Identify the characteristics of electromagnetic and mechanical waves. • Electromagnetic Waves- can travel through a medium or through a vacuum (empty space). • Examples: light, radio waves, infrared, microwaves • Mechanical Waves- HAVE to have a medium to transfer energy • Example: sound

  3. Sound in a vacuum: http://www.ltscotland.org.uk/5to14/resources/science/sound/belljar.asp

  4. S8P4b Describe how the behavior of light waves is manipulated causing reflection, refraction, diffraction and absorption. • Reflection: bouncing back of a wave • Refraction: bending of a wave through a different medium

  5. Diffraction: bending on the wave through a barrier or small opening • Absorption: electromagnetic waves disappear into a medium

  6. S8P4.c Explain how the human eye sees objects and colors in terms of wavelengths. • The eye sees colors from the electromagnetic spectrum. • All colors are based on their wavelength. • From longest to shortest: Red, Orange, Yellow, Green, Blue and Indigo and Violet.

  7. S8P4. d Describe how the behavior of waves is affected by medium (air, water and solids). • Sound travels fastest to slowest in a solid, then liquid, then gas, respectively. • Light travels fastest to slowest in a gas, then liquid, then solid respectively.

  8. S8P4e Relate the properties of sound to everyday experiences. • Sound waves can vary in pitch depending on the frequency of the wave. • The loudness can vary depending on the amplitude of the wave (distance from resting position).

  9. S8P4 f Diagram the parts of the wave and explain how the parts are affected by changes in amplitude and pitch. • Parts to know: crest, trough, amplitude, wavelength, starting (resting) position, compression, rarefaction

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