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Homework Statement
Identify the following as an example of Refraction, Diffraction, or Interference
1) Rainbow pattern on a compact disk
2) The floating blotches in our eyes
3) Rainbow pattern on a beetle's back
4) The dark bands seen a a window screen
Homework Equations
none needed
The Attempt at a Solution
There's a lot more questions than this i had for homework, but these are the ones i couldn't quite identify.
1) i would guess refraction because i think the light is being redirected, but I'm second guessing myself and wondering if somehow the light is actually being scattered on the disk?
2) I honestly have no idea. I'm not even exactly sure what the teacher means by 'floating blotches'
3) same as number 1... i think its refraction, but I'm just not sure.
4) I'm not entirely sure what the teacher means by this either, but i think its interference?
please explain your answers. I know the difference between Refraction, Diffraction, and Interference, but I'm not entirely sure how you know which is which per different scenario. many thanks!