As Neils Bohr showed, it is possible for electrons to move between energy levels. Light contains energy. If a photon of light strikes an atom, it is possible for the energy in the light ray to be transferred to one of the low energy electrons moving around the atomic center.
Spotting before a period is due â reasons for spotting before a period can be implantation, from a cyst or a short luteal phase and impaired egg quality. Spotting in between cycles â this is a difficult term to answer but often means your cycles are growing shorter; often with perimenopause.
Women who are nearing menopause may have spotting, irregular periods, or skip periods entirely. A condition called endometrial hyperplasia, which involves excessive or abnormal thickening of the uterine lining, can also cause spotting. In some cases, endometrial hyperplasia can lead to cancer of the uterus.