Black Light
Anna Crisafi
Rauna Landing
Anna Crisafi
Rauna Landing
Black Light in a Box
By: Anna Crisafi and Rauna Landing
A process in which light is emitted when electrons jump from high energy states to low energy states. When an atom absorbs a high-energy UV photon an electron moves up into a high energy state. In an ordinary substance the electron will fall back down to its original state and in doing so emit a UV photon. In a fluorescent material the electron does not fall in straight path, but in a series of smaller transitions. During one of these transitions a lower energy visible photon is emitted, this causes the material to glow. The material converts invisible UV light to visible light.
A black light is essentially a fluorescent light with only one phosphor coating on the inside of the tube. The phosphor coating is used to make the UV light visible.
By: Anna Crisafi and Rauna Landing
A process in which light is emitted when electrons jump from high energy states to low energy states. When an atom absorbs a high-energy UV photon an electron moves up into a high energy state. In an ordinary substance the electron will fall back down to its original state and in doing so emit a UV photon. In a fluorescent material the electron does not fall in straight path, but in a series of smaller transitions. During one of these transitions a lower energy visible photon is emitted, this causes the material to glow. The material converts invisible UV light to visible light.
A black light is essentially a fluorescent light with only one phosphor coating on the inside of the tube. The phosphor coating is used to make the UV light visible.
Invisible UV light is emitted.
UV absorption causes electron to move up to a higher energy level.
Electron relaxes to a slightly lower energy,
some energy lost, but no light is emitted.
Visible light is emitted,
when the electron falls back down to the ground state.
UV absorption causes electron to move up to a higher energy level.
Electron relaxes to a slightly lower energy,
some energy lost, but no light is emitted.
Visible light is emitted,
when the electron falls back down to the ground state.