With more education and experience, accountants can become certified. Some financial documents, such as those submitted to the Securities and Exchange Commission, must be signed by a Certified Public Accountant.
Hyperchromicity is the increase of absorbance (optical density) of a material. The most famous example is the hyperchromicity of DNA that occurs when the DNA duplex is denatured. The UV absorption is increased when the two single DNA strands are being separated, either by heat or by addition of denaturant or by increasing the pH level.
I think a good answer to this is under another question here:chemistry.stackexchange.com/questions/35734/â¦ The first answer gives an explanation of how both ozone and oxygen absorb UV. In regards to your second question, there isn't enough ozone (or other UV absorbing compounds) to perfectly screen the Earth's surface. In addition, ozone absorbs only specific wavelengths of UV light, so other UV wavelengths could get through. â Tyberius Mar 4 '17 at 5:41 Although you ask about ozone and UV light, the process is completely general is the same for any molecule, chlorophyll in plants, the dye in your T shirt, ink on paper etc. In the molecule, if the photon has the right amount of energy, it excites an electron to a higher molecular orbital and so forms an excited state.