Why does infrared radiation not affect non polar bonds? Urgent help needed!Watch
I'm going to quote in Puddles the Monkey now so she can move your thread to the right place if it's needed.
Meant to be researching why does infrared radiation not affect non polar bonds for chemistry in terms of how infrared radiation causes polar bonds to vibrate and give them energy etc. hence our greenhouse gases BUT why does infrared radiation not affect non polar bonds?? What is it about the non-polar bond/infrared radiation that makes this case?
To interact with matter they must encounter a non-isotropic electrical/magnetic field such as is produced by a dipole changing due to molecular vibration (stretch, bend etc). This allows the changing dipole to absorb energy of a suitable wavelength and move between quantum states.
It's rather like the changing dipole is vibrating at one energy level and then it absorbs radiation to vibrate at a higher level.
Vibrations which do not produce a change in dipole cannot have different energy levels of this kind and so cannot absorb radiation.