How Do You Spell ANGLE OF EXTINCTION?

Pronunciation: [ˈaŋɡə͡l ɒv ɛkstˈɪŋkʃən] (IPA)

The phrase "angle of extinction" refers to the angle at which light is polarized when passing through a mineral under crossed polars. The spelling of this term is straightforward, with each word pronounced phonetically as follows: /ˈæŋɡəl/ of /ɪkˈstɪŋkʃən/. The "a" in "angle" is pronounced as in "cat", and the "o" in "of" as in "pot". The stress is on the second syllable of "extinction", with a short "i" sound in the first syllable, as in "tick". This term is commonly used in geology and mineralogy to identify and classify minerals.

ANGLE OF EXTINCTION Meaning and Definition

1. The term "angle of extinction" refers to a concept primarily used in the field of mineralogy and optics and refers to the angle at which the colors of certain minerals or crystals become completely extinguished or disappear. When light passes through a mineral or crystal, it undergoes interference and polarization due to the internal arrangement of the material's atoms or molecules. This causes the light to split into two polarized rays that vibrate perpendicular to each other.

   The angle of extinction is the angle between one of these polarized rays and a crystal face or cleavage plane of the mineral, at which the light becomes completely absorbed or extinguished. At this specific angle, the incident ray of light aligns perfectly with the crystal's lattice structure, causing one of the polarized rays to be absorbed by the crystal, while the other passes through. Consequently, the colors and intensity of the transmitted light change significantly or vanish completely, as the light rays become out of phase with each other.

   The angle of extinction is a significant property that aids mineralogists and geologists in identifying and distinguishing various minerals. By observing the angle at which light is extinguished, they can deduce critical information about the crystal structure and its characteristics. This measurement is typically obtained through the use of a polarizing microscope, which allows researchers to view the mineral under controlled lighting conditions and determine the angle at which the mineral's colors disappear entirely. Consequently, angle of extinction plays a crucial role in mineral identification, specimen analysis, and understanding the optical behavior of minerals and crystals.

Common Misspellings for ANGLE OF EXTINCTION

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