Photon emission is the process by which an atom or molecule releases a photon, typically when an electron transitions from a higher energy level to a lower one. This fundamental mechanism is responsible for phenomena such as fluorescence, phosphorescence, and the emission of light from stars and other celestial bodies.

Photon Emission

Photon emission

atom or molecule

releases a photon

Electron transitions are the movements of electrons between different energy levels within an atom, often resulting in the absorption or emission of photons. These transitions are fundamental to understanding atomic spectra and are crucial in fields like quantum mechanics and spectroscopy.

electron transitions

higher energy level

Lower energy level

fundamental mechanism

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation, typically visible light emitted after absorbing ultraviolet light. This process is used in a wide range of applications, from biological imaging and mineralogy to creating fluorescent lights and detecting counterfeit money.

fluorescence

Phosphorescence is a type of photoluminescence where a material absorbs photons and re-emits them over a longer period, unlike fluorescence which re-emits almost immediately. This delayed emission is due to the transition of electrons from a higher energy state to a lower energy state being 'forbidden' or less probable, resulting in the gradual release of light.

phosphorescence

emission of light

तारे विशाल गैसों के खगोलीय निकाय हैं जो अपनी अत्यधिक गर्मी और ऊर्जा के कारण प्रकाश और गर्मी का उत्सर्जन करते हैं। ये तारे ब्रह्माण्ड के विकास और संरचना में महत्वपूर्ण भूमिका निभाते हैं।

stars

Celestial bodies are natural physical entities found in the universe, including stars, planets, moons, asteroids, comets, and meteoroids. They are studied to understand the formation, structure, and evolution of the universe, as well as the potential for life beyond Earth.

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