Wave classification powerpoint2
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There are two main ways that waves can be classified: by what they move through (the medium) and by how the energy moves through the medium. Waves that require a medium are mechanical waves like sound, water, and seismic waves. Electromagnetic waves can travel through matter or empty space. Mechanical waves are further divided into compressional/longitudinal waves where the medium vibrates parallel to the wave direction, and transverse waves where the medium vibrates perpendicular to the wave direction. Examples of each type of wave and their characteristics are provided.
Wave classification powerpoint2
- 1. Whats the deal with WAVE classification? red words= vocabulary
- 2. How are WAVES classified?
- 3. Waves can be classified by WHAT they move through or by HOW energy moves through them.
- 4. Wave Speed The speed of a wave depends on the properties of the medium it is traveling through In general sound waves travel the fastest through solids then liquids then gases Light waves travel the fastest in empty space and slowest through solids Sound waves travel faster through warmer mediums
- 5. The speed of waves The speed of a water wave is how fast the wave spreads, NOT how fast the water surface moves up and down or how fast the dropped ball moves in the water. How do we measure the wave speed?
- 7. Classification of WAVES by WHAT they move through
- 8. Whats the deal with WAVE classification? There are two classifications for waves based on what they move through: Mechanical Waves Electromagnetic Waves red words= vocabulary
- 10. Mechanical waves are waves that can ONLY move through a medium (through matter).
- 11. Mechanical waves require the particles of the medium to vibrate in order for energy to be transferred.
- 12. What are examples mechanical WAVES?
- 13. water waves earthquake/seismic waves sound waves waves that travel down a rope or spring All of these examples CANNOT move through empty space.
- 15. Empty space is space in which NO MATTER is present. Another name for this is a vacuum.
- 16. What are electromagneti c WAVES?
- 17. Electromagnetic waves are waves that can travel through matter or empty space where matter is not present.
- 18. What are examples of electromagnetic WAVES?
- 19. radio waves microwaves infrared waves visible light ultraviolet rays X-rays
- 20. Classification of WAVES by HOW energy moves through them
- 21. There are two classifications for waves based on how energy moves through them: Compressional/Longitudinal Waves Transverse Waves
- 22. Seismic Waves Seismic waves combination of transverse and compressional waves which carry energy along and through Earth
- 23. What are compressional/ longitudinal WAVES?
- 24. Mechanical waves in which the particles of matter in the medium vibrate by pushing together and moving apart parallel to the direction in which the wave travels are called compressional/longitudinal waves.
- 26. The place on the wave that is pushed together is called the compression and the place that is moving apart is the rarefaction.
- 27. What are examples of compressional/ longitudinal waves?
- 28. sound waves some waves in a spring some seismic waves (earthquake waves- primary waves, to be exact)
- 30. Transverse Waves Transverse waves matter moves in the medium back and forth at right angles to the direction that the wave is traveling Light waves & water waves
- 31. Mechanical waves in which the particles of matter in the medium vibrate by moving back and forth and perpendicular (at right angles) to the direction the wave travels are called transverse waves.
- 33. The highest point of a transverse wave is the crest and the lowest point is called a trough.
- 34. What are examples of transverse waves?
- 35. strings on a musical instrument waves on a rope some waves in a spring some seismic waves (earthquake waves- secondary waves, to be exact)
- 36. Electromagnetic waves are transverse waves that can travel without a medium through empty space.
- 37. 37
- 38. The Parts of a Wave Crest the highest points of a wave Trough the lowest points of a wave
- 39. Wireless Communication Radio Waves Radio stations transmit signals by changing a radio waves amplitude or frequency. What is the wave property that is constant? 39
- 41. Wavelength Wavelength the distance between one point on a wave and the nearest point just like it
- 42. Frequency and Period Frequency the number of waves that pass a given point each second Measured in Hertz = 1/sec Period: The amount of time it takes one wavelength to pass a point
- 43. Frequency and Wavelength Frequency and wavelength are inversely related Long wavelength = Low frequency Short wavelength = High Frequency
- 44. Waves of the Electromagnetic Spectrum The Electromagnetic Spectrum The electromagnetic spectrum can be broken up into different categories. Use the word bank to complete the boxes in the diagram. 44
- 45. Four wave interactions When a wave encounters a surface, four interactions can occur: reflection, refraction, dif fraction, or
- 47. Wave interactions Dif fraction usually changes the direction and shape of the wave. When a plane wave passes through a small hole dif fraction turns it into a circular