FIS 20600 – Exam 1 Study Guide and Practice Questions
Microscope - ANS✔✔ universal image of forensic science
Simple Microscope - ANS✔✔
Compound Microscope - ANS✔✔ dual lens system
transparent light
40x-400x magnification
biological materials
isotropic materials
What are the components of a microscope - ANS✔✔
Polarizing Light Microscope - ANS✔✔ uses filters to divide light into 2 parts (2 rays)
rotatable stage
anisotropic materials
crystal orientation identification
Refraction - ANS✔✔ bending of light through a translucent material
Isotropic - ANS✔✔ Materials with the same optical properties in all directions.
includes all gases, liquids, and certain solids
Anisotropic - ANS✔✔ Materials have varying optical properties dependent on the orientation to
the light.
, Includes 90% of all solids
Real Image - ANS✔✔ -Inverted from the object
-object is enlarged on the opposite side
-exists in real space
Virtual Image - ANS✔✔ -only seen when looking through the lens
-It is on the same side as the object and goes in the same direction as the object (erect)
Birefringence - ANS✔✔ -This results when anisotropic material is exposed to crossed polarized
light
- the difference with respect to the thickness of the material
Interference Colors - ANS✔✔ -2 rays of light split by anisotropic material
-Interferes destructively or constructively
Pleochroism - ANS✔✔ variation in the material's absorbance of light as opposed to refractive
index (RI)
Michel-Levy Chart - ANS✔✔ banding patter of repeating color (interference) variation to
thickness of material
How do you figure the total magnification of a compound microscope? - ANS✔✔ Magnification
of lens 1 multiplied by the magnification of lens 2
When do you use a scanning electron microscope with x-ray analysis? - ANS✔✔ In analysis of
gunshot residue, paints, & metals
Microscope - ANS✔✔ universal image of forensic science
Simple Microscope - ANS✔✔
Compound Microscope - ANS✔✔ dual lens system
transparent light
40x-400x magnification
biological materials
isotropic materials
What are the components of a microscope - ANS✔✔
Polarizing Light Microscope - ANS✔✔ uses filters to divide light into 2 parts (2 rays)
rotatable stage
anisotropic materials
crystal orientation identification
Refraction - ANS✔✔ bending of light through a translucent material
Isotropic - ANS✔✔ Materials with the same optical properties in all directions.
includes all gases, liquids, and certain solids
Anisotropic - ANS✔✔ Materials have varying optical properties dependent on the orientation to
the light.
, Includes 90% of all solids
Real Image - ANS✔✔ -Inverted from the object
-object is enlarged on the opposite side
-exists in real space
Virtual Image - ANS✔✔ -only seen when looking through the lens
-It is on the same side as the object and goes in the same direction as the object (erect)
Birefringence - ANS✔✔ -This results when anisotropic material is exposed to crossed polarized
light
- the difference with respect to the thickness of the material
Interference Colors - ANS✔✔ -2 rays of light split by anisotropic material
-Interferes destructively or constructively
Pleochroism - ANS✔✔ variation in the material's absorbance of light as opposed to refractive
index (RI)
Michel-Levy Chart - ANS✔✔ banding patter of repeating color (interference) variation to
thickness of material
How do you figure the total magnification of a compound microscope? - ANS✔✔ Magnification
of lens 1 multiplied by the magnification of lens 2
When do you use a scanning electron microscope with x-ray analysis? - ANS✔✔ In analysis of
gunshot residue, paints, & metals
