The single particle, which in a group are responsible for electromagnetic radiation of all wavelengths, including gamma rays, x-rays, light, microwave energy, and radio waves
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Category: <span>P</span>
A nonmetallic mineral element. Symbol, P
The residual emission of absorbed energy in the form of light by a substance, following exposure to incident radiation
A mineral containing phosphorous
A term for igneous rocks having a texture of grainy crystal visible to the naked eye
An ore of uranium
A rock metamorphically recrystallized
A vertical body of rock formed from lava and debris moving directly upward
A vacant space, hole or cavity in rock or soil
A tower, cone-like or pyramidal or pointed mass