The fluorescence color of calcite can vary depending on the presence of activator impurities. Manganese (Mn²⁺) substituting for calcium ions in the calcite lattice is a common activator for fluorescence. Manganese-activated calcite is well-known to fluoresce red or orange when illuminated with UV light.
A rock containing the fluorescing calcite is illuminated by ultraviolet light. Then, the colour of the rock seems to be
Asked in TNPSC CS Prelims 2021 · Topic: Optics (Wave Nature of Light: Huygens' Principle)
More Physics questions
- Raman effect is scattering by
- Quantum nature of light is not supported by the phenomenon of
- Which of the following radiations has the highest energy per quantum ?
- Which of the following electro magnetic radiations has the maximum energy?
- Diffusion of light in the atmosphere takes place due to
- Which one among the following has largest energy per photon ?
- Light waves are
- The quanta of light is called