Chapter 2.1 Notes
Name: ____________________ #________ Waves and the Electromagnetic Spectrum
Date: _______________ Per. ___________ Essential Questions: What causes waves? What are the basic properties of waves? What does an electromagnetic wave consist of? What are the waves of the electromagnetic spectrum? What is a wave? A disturbance that transfers ______________________from one place to another. What is energy? The ability to do ___________________ What is a “medium”? A material that a wave _______________________________________ Can be: ___________________________________________________ Mechanical waves require a medium to travel Electromagnetic waves do NOT require a medium to travel ___________________________ an up/down or back/forth repeated motion Transverse waves travel ______________________ to the direction of travel. ________________________ high point in the wave ________________________ low point in the wave _________________________ distance particles of a wave move from rest point ________________________ = distance between crest/crest OR trough/ trough ________________________ number of waves that pass a certain point in a given amount of time. Hertz: A unit that measures frequency. A wave that occurs every second has a frequency of 1 Hertz (1 Hz). Longitudinal wave: medium moves in the direction of the wave. Compression zone Rarefaction zone Label the parts of the wave: What is an electromagnetic wave? Vibrating electric and magnetic fields that move through _________________________ at the speed of ______________________. Speed of light= ____________________________________ Vs. Speed of sound ____________________________________ What is the electromagnetic spectrum? The complete range of of electromagnetic waves placed in increasing frequency.