Input interpretation
plagioclase feldspars | 2V angle
2V angle rankings
1 | albite | 127 π/360 rad 127/2° 2 | anorthite | 13 π/30 rad 78° 3 | andesine | 4 π/9 rad 80° 4 | labradorite | 41 π/90 rad 82° 5 | bytownite | 7 π/15 rad 84° 6 | oligoclase | 7 π/15 rad 84°
Unit conversions for median 2V angle 9 π/20 rad
81° (degrees) (exact)
5^h 24^m (right ascension)
9/10 quad (quadrants) (exact)
Comparisons for median 2V angle 9 π/20 rad
≈ ( 0.23 ≈ 1/4 ) × full angle ( 2 π rad )
≈ 3.5 × tilt of the earth's axis relative to its orbital plane ( ≈ 23° )
Visual representation for 9 π/20 radians
Visual representation for 9 π/20 radians
Corresponding quantity
Rotation count N from N = φ/(2π): | 0.23 rot (rotations)