premise: Fluorescence of a substance is seen when the molecule is exposed to a specific wavelength of light (excitation wavelength or spectrum) and the light it emits ( the emission wavelength or spectrum) is always of a higher wavelength.
hypothesis: When exposed to ultraviolet, some substances, such as minerals, glow in characteristic visible wavelengths, in a process called fluorescence.
hypothesis_graph_structure: some substances, such as minerals<>glow<>in characteristic visible wavelengths<>When exposed to ultraviolet$$$a process<>called<>fluorescence