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# WAVES

## on Feb 21, 2012

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## WAVES Presentation Transcript

• Submitted by: 5 Camille Joyce Bautista 6 Rica Rosario Borja 7 Iannah Blanche Braga 8 Ma. Cecillia Bukirin IV- St. Angela
•
• What is a WAVE?
• A disturbance that travels through space and time, usually accompanied by the transfer of energy.
• Crest and Trough:
• CREST – maximum value or upward displacement within a cycle.
• TROUGH – minimum or lowest point in a cycle.
• Crests and Troughs
• Amplitude:
• Magnitude of change
• Oscillation - repetitive variation
• Measure of energy transferred
• Equilibrium Position
• Also known as rest position.
• Wavelength
• Distance between one point on a wave to the identical point in the next wave in the series.
• (ex. Crest to crest, trough to trough)
• Represented by greek symbol λ (lamda)
• Characteristics of a wavelength:
• FREQUENCY - how often the particles of the medium vibrate when a wave passes through the medium
• - temporal frequency
• - Hertz (Hz) or cycles per second
• PERIOD - the time needed for each particle to complete one full wave movement.
• Types of waves:
• LONGITUDINAL WAVE- parallel to the direction of wave propagation.
• - move backward and forward along the direction in which the wave is travelling.
• TRANSVERSE WAVE- perpendicular to the direction of wave propagation.
• - propagating from left to right.
• - the particles do not move along with the wave
• -oscillate up and down
• Longitudinal and Transverse Waves
•
• Classifications of wave:
• MECHANICAL - also known as material wave.
• - needs a medium to travel.
• - ex. ocean waves, and sound waves
• - requires initial energy input.
• Types: Transverse, Longitudinal, and Surface waves.
• ELECTROMAGNETIC - require no medium but can travel through one.
• -can travel not only through air and solid materials, but also through the vacuum of space.
• Mechanical and Electromagnetic Waves
• Often abbreviated as E-M radiation or EMR
• Form of energy that exhibits wave-like behavior as it travels through space.
• Has both electric and magnetic field components.
• Classified according to the frequency of its wave.
• Carries energy and momentum that may be imparted to matter with which it interacts.
• Increasing frequency and decreasing wavelength.
• Consists of radio waves, micro waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
•
• QUIZ:
• 1. It is a disturbance that travels through space and time, usually accompanied by the transfer of energy.
• 2. It is also known as material wave.
• 3. It is a classification of waves that require no medium but can travel through one.
• 4. It is a type of wave that is perpendicular to the direction of wave propagation.
• 5. It is known as the rest position.