EMR Science 8 Lesson 1 PDF

Learning Intentions I can describe a wave. I can identify important features of waves. I can explain the difference between the two types of waves. I can describe constructive and destructive wave interference.  Big Ideas Electromagnetic energy behaves as both a p...

Learning Intentions I can describe a wave. I can identify important features of waves. I can explain the difference between the two types of waves. I can describe constructive and destructive wave interference.  Big Ideas Electromagnetic energy behaves as both a particle _________________ and a wave ______________. Many properties of light can be understood using a wave model of light _______________________.  What is a Wave? A wave is a disturbance or movement transfers energy that ________________ ___through matter or other medium, without causing any displacement permanent _________________.  Wave Features highest point of a wave Crest – the _________ lowest point of a wave Trough – the ________ (more wave features) Wavelength – a measure of onecomplete cycle _________________ : from trough to trough, or from crest to crest. Measured in meters. Amplitude – The height _________ of a waves crest or depth of a waves trough, measured from resting position.  Frequency Each cycle (wave length) is called an oscillation _____________. Frequency is the number of cycles (oscillations) that occur over a certain amount of time. Hertz (Hz) Frequency is measured in ______________. Hz = # of oscillations per second  Types of Waves Transverse Waves – matter in the medium perpendicular (90o) moves _______________________ to the direction of the waves. Ex: Shaking one end of a rope or slinky, water waves, a vibrating guitar string Types of Waves (continued) Compression waves – matter in the medium moves back and forth along the same direction that the wave travels. _________________ Ex: sound, some types of Earthquake waves  Interference When 2 or more waves hit each other, they interfere ___________ with one another. There are 2 types of interference: 1. _______________ constructive interference _______________ 2. _______________ destructive interference ________________ Interference (continued) When waves interfere constructively, they larger produce 1 wave with a ___________ amplitude. When they interfere destructively, it produces 1 wave with a __________smaller amplitude.