Refractometry Flashcards
1
Q
a measure of how effective a material is in
bending light coming from a vacuum
A
Index of
refraction
2
Q
The simplest way to measure IR of a mineral
A
Immersion
method
3
Q
The degree to which mineral grains stand out
from the mounting medium
A
Relief
4
Q
mineral and oil/balsam indices differ
by 0.12 or more
A
High relief
5
Q
indices differ by roughly 0.04 –
0.12
A
Moderate relief
6
Q
mineral and oil/balsam indices differ
by 0.12 or more
A
High relief
7
Q
When the focal distance is increased (stage down), the becke line goes to the mineral with __ index of refraction
A
higher
8
Q
a technique whereby light is projected at the
specimen from a sideways, slanting angle to
reveal features with higher contrast as compared
to when viewed with brightfield illumination
A
Oblique
illumination
method
9
Q
A
