Light & Atomic Spectra & Nuclear Chemistry. Planck’s Constant. Types of Light. Visible light is the light that humans can see. Did you know?. Dogs can see only shades of gray and some insects can see light from the ultraviolet part of the spectrum. Seeing the Light.
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The quantum theory says light consists of very small bundles of energy/particles called photons.
When you use the dimmer switch on the wall, you are decreasing the number of photons sent from the light bulb.
The type of light is the same while the amount has changed.
When heated: electrons gain energy and jump into any of the empty orbitals at higher levels –
for example, into the 7s or 6p or 4d, depending on how much energy is absorbed from the flame.
Because the electrons are now at a higher and more energetically unstable level, they tend to fall back down to where they were beforeFor example, a sodium (na) ion in an unexcited state has the structure 1s22s22p6.
It might fall straight back or jump through many levels… empty orbitals at higher levels –
Each of these jumps involves a specific amount of energy being released as light energy, and each corresponds to a particular color.