Photons may occur in the form of x-rays, gamma rays, or quanta of light. The energy (E) of a photon is expressed as the product of its frequency (v) and Planck's constant (h), as in the equation E = hv. X-ray photons occur in frequencies of 10 18 to 10 21 Hz and energies that range upward from 1 KeV.
Confidence votes 52.5K. In the US, the standards called General Industry Standards are the OSHA standards at 29 CFR 1910 and are sometimes called Part 1910.
Standards are all around us, even if we are not always aware of them. One example of a widely-used standard is the A4 size for sheets of paper. A standard is a document that sets out requirements for a specific item, material, component, system or service, or describes in detail a particular method or procedure.Standards facilitate international trade by ensuring compatibility and interoperability of components, products and services.herefore, a European Standard (EN) automatically becomes a national standard in each of the 33 CEN-CENELEC member countries. Standards are voluntary which means that there is no automatic legal obligation to apply them. However, laws and regulations may refer to standards and even make compliance with them compulsory.