Advanced Higher Physics (Unit 2, Simple Harmonic Motion and Waves) by Brooklyn Junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j Notes for the CFE course. en-us 2016-12-13 14:23:48 UTC 2023-03-16 04:56:57 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Diskette.png A Definition brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143364019 When an object is displaced from its point of rest, the unbalanced force is proportional to the displacement of the object and acts in the opposite direction, the motion is said to be simple harmonic.]]> 2016-12-13 14:25:56 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143364019 We can write this as brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143364384 F = -ky]]> 2016-12-13 14:26:51 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143364384 Simple Harmonic Motion brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143364742 2016-12-13 14:27:54 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143364742 It's useful in many things. brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143365633 An example would be in pendulums ]]> 2016-12-13 14:30:14 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143365633 This links to Newton's Second Law, along with other things brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143367438 As k is a force constant and mass (m) is also a constant then k/m is a constant and related to the period of motion where: 
w^2 = k/m and w=2π/T ]]> 2016-12-13 14:34:58 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143367438 brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143595996 2016-12-14 14:07:40 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143595996 Some things to note... brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143597867 Remember the negative sign, it's easy to forget, but please try and don't!]]> 2016-12-14 14:13:37 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/143597867 Optical Path Difference brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/149004623
Light has a slower speed and smaller wavelength when it passes through a piece of transparent material. Thus, two coherent waves, initially in phase, could get a phase difference.

The optical path length = refractive index * Geometric path length

With interference, we are interested in the phase difference and posts of maxima and minima

With this type of difference, Optical Path, we must use the equations of...

Phase Difference = 2π/λ * optical path difference

Our equasions:
2nd = m*λ (Deconstructive Interferance)
2nd = (m+0.5)λ  (Constructive Interference)

n = REfrative index of material 
d = thickness of the material 
λ = wavelength of the light in meters
m = integer 
]]> 2017-01-24 13:57:57 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/149004623 brooklyn_alexander_junor https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/149013636 2017-01-24 14:17:34 UTC https://padlet.com/brooklyn_alexander_junor/i96ek9b2234j/wish/149013636