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Waves are disturbances that propagate through space and time. Classically, they travelled through a medium, disturbing the particles but not changing their mean position. Electromagnetic waves/particle-waves need no medium; they are disturbances in their respective fields.

4 votes
1 answer
329 views

Does Hyugens principle apply in three dimensions?

Does Hyugens principle apply in three dimensions ? If a surface wave (for simplicity an ocean wave) is propagating along the x axis we know that this wave ray is a point source for wavelets on the y …
Quentin Chester's user avatar
0 votes
0 answers
38 views

Effect of aeration on Celerity

Suppose a ocean wave encountered a section of ocean which had a higher level of aeration from gas such as methane escaping from the seafloor. Due to the aerated sections apparent lower density would …
Quentin Chester's user avatar
0 votes
1 answer
27 views

Making a lense using an array?

Would it be possible to build a lense out of array elements with a higher refractive index inter spaced with void elements eg a matrix of glass with air. I imagine that the spacing would have to be …
Quentin Chester's user avatar