The next range, from 290 to 320 nanometers, causes the skin to redden, while the shortest wavelengths can cause cancer.
The range with the longest wavelength is used to induce vitamin D formation and to treat psoriasis. The next range, from 290 to 320 nanometers, causes the skin to redden, while the shortest wavelengths can cause cancer. FTP, identify this type of ra  diation, which lies between visible light and X-rays and which constitutes the most damaging portion of sunlight.
The range with the longest wavelength is used to induce vitamin D formation and to treat psoriasis.
ultraviolet (accept UV) radiation