What determines the penetration of UV rays through the ozone layer?

[Abhijit Nath]

According to Max planks equation, E=h*f, the more is the frequency the more is the energy of the EM waves. So why UVC (shortest uv ray or high frequency uv ray ) is absorbed by the ozone and UVA and UVB rays ( longer uv rays than UVC penetrate the ozone and reach the Earth's surface?

 

[blue_leaf77]

It's the molecules constituting the ozone that determines how much light is absorbed at different frequencies. Within UV region, the absorption mainly comes from O₂ and O₃.