Ultraviolet protection by ozone 9 Relative Actual action sensitivity urn Ground-level radiation 60 6 好 3 2 270 280 320 33 0 340 Wavelength of Light(nm) The overlap of ground level radiation with the sunburn sensitivity curve would be much greater without the filtering effects of the ozone layer.Ultraviolet protection by ozone The overlap of ground level radiation with the sunburn sensitivity curve would be much greater without the filtering effects of the ozone layer