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Name | Mastery | Learn | Test | Matching | Spaced |
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air
1.0
water
1.33
boro silicate crown glass
1.509
cedar wood oil
1.51
hard crown glass
1.5175
spectacle crown glass
1.52 or 1.523
canada balsam
1.526
quartz
1.55
polycarbonate
1.586
dense flint glass
1.616
dense flint crown glass
1.62
light flint glass
1.676
extra dense flint
1.690
barium crown
1.701
double extra dense flint glass
1.7129
diamond
2.4173
trivex
1.53
cr39
1.498
ethyl alcohol
1.36