Physics (Chapter 7)- General Properties Of Waves
-Oscillates perpendicular the the direction of energy transfer
-All electromagnetic waves are transverse waves
-Moves through a process of compression and rarifaction
-Travel parallel to the direction of energy transfer
-Sound waves (example)
Name several features of a wave
The bigger the amplitude of the waves.....
the more energy the waves carry
The number of waves passing through a point in one secon
When and how are waves refracted
When they pass through a medium of one density to another
-When the wavelets are slowed down, they changed direction
How are waves reflected?
When waves bounce off a plane, it creates a wave let moving away from the plane. This wavelet lines up with the previous "reflected" wavelets to form a reflected wavefront
The spreading of waves when the pass through a gap or move past an object
The narrow the gap the waves pass through....
The greater the effect of diffraction
Explain the properties of diffracted waves using the examples of:
2) Radio reception and hills
1. The uCltra sound waves diffract and spread out through the womb, providing a clear image of the foetus
2. If hills are present between a radio transmitter and a hill, the radio waves are diffracted by the hill, but do not spread enough behind the hill
The reinforcement or canceling of two identical sets of waves when they overlap.
When are waves canceled
When a crests from a wave cancels troughs from another wave
When are waves reinforced?
When crests or troughs meet
Which is more powerful in terms of amplitude?
Crest meet crest
Trough meet trough