Hey all,
Can someone please explain why wavelength affects diffraction?
Thanks, Matt
Hey Matt!
Wavelength does affect diffraction.
The visible light part of the light spectrum, ranges from 400nm to 700nm, as wavelength decreases so too does the angle of diffraction, but if the wavelength increases so too does the angle of diffraction:
+💡Increasing Wavelength = Increasing Defraction rate
-💡Decreasing Wavelength = Decreasing Defraction rateFor Example, a wave coloured
red, has a wavelength of about
~635nm - 700nm. According to its length, it will have a larger defraction rate than a
blue wavelength which is around
~400nm - 450nmWhy it affects diffraction --> Because of the size of the wavelength
You can have a go at this PHET simulation to help with understanding:
https://phet.colorado.edu/sims/html/wave-interference/latest/wave-interference_en.htmlI hope this makes sense and helps
Coolmate