That is, if you observe the spectrum of a star and can determine the wavelength where the emission peaks (Î»max), you can calculate that starâs temperature. Here is another copy of the plot that we studied in Lesson 3: Figure 4.1: Two-dimensional plot of the spectrum of a blackbody with different temperatures.
Igneous rocks usually contain the most crystals. The longer it takes the magma to cool, the larger the crystals.
Cave of the Crystals. This is the home of the worldâs largest known crystals in Chihuahua, Mexico. It is a horseshoe-shaped cavity in limestone rock which is 10 meters wide and 30 meters long and contains giant selenite crystals even 36 ft long, 4 m in diameter and 55 tons in weight.