Pre-Lesson Resonance box, Beaker, pencil, water Refraction, reflection video Mirror.

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Presentation transcript:

Pre-Lesson Resonance box, Beaker, pencil, water Refraction, reflection video Mirror

OBJ: Given notes and activity sheet SWBAT explain the difference between reflection, refraction, diffraction and resonance with 70% accuracy. DN: Define amplitude, wavelength and frequency. ACT: Introduction to reflection, refraction, diffraction and resonance Read, Text p ; Complete Interactions of Waves Booklet. HW: Complete Interactions of Waves Booklet; Study Science Vocabulary List (SVL), define absorb-environment; WES Exam, Nov 19.

LESSON NOTES Reflection: wave hits a surface and bounces back; occurs in one medium only. Example: mirror

REFLECTION

LESSON NOTES Law of Reflection: angle of incidence equals the angle of reflection Incoming (Incident) ray: a wave moving toward the surface at an angle Reflected ray: a wave that bounces off the surface at an angle Normal: an imaginary line drawn perpendicular to the surface at the point where the incoming (incident) ray strikes the surface See transparancy

LAW OF REFLECTION

Lesson Notes Refraction: a wave moving from one medium into another medium changes speed causing the wave to bend; two (2) mediums. Example 1: white light breaks up into ROYGBIV by a prism. –Example 2: A rainbow is formed by refraction of sunlight through rain droplets. –Example 3: chopstick in beaker of water (see refraction video)

REFRACTION

Lesson Notes Diffraction: a wave moves around a corner or through a narrow opening

Lesson Notes Resonance: an increase in amplitude (loudness) of a vibration that occurs when external vibrations match an object’s natural frequency. When sound vibrates an object without touching the object. Example: resonance box, jet/train vibrating a window