BIO203 – Microscopy and Hair Analysis in Forensic
Biology
What is the magnification of the ocular lens? - 10X
What is the magnification of the low power objective? - 10X
High Power? - 40X
What is the total magnification of the ocular and low power? - 100X
Ocular and high power? - 400X
Which is the only adjustment knob you should use while on high power? - Fine
adjustment
Which adjustment knob do you use on low power? - Coarse and Fine adjustment
Light Source - Light built into the base (mirror or bulb)
Ocular Lens - Magnifies the image and focuses light into your eye
How do you calculate the power of magnification? - Multiply the power of the ocular lens by the
power of the objective.
Coarse Adjustment -
Fine Adjustment -
Objective -
Base and Arm - Structural support
Inclination Joint - located at the bottom of the instrument, where the base connects to the arm.
The inclination joint allows a microscope to tilt.
, Body Tube - The microscope body tube separates the objective and the eyepiece and assures
continuous alignment of the optics.
Revolving Nosepiece - This is the part that holds two or more objective lenses and can be rotated
to easily change power. Objective Lenses: Usually you will find 3 or 4 objective lenses on a
microscope.
Objective lens - Gathers light and magnifies image
High Power Objective - A high power objective lens is an important part of a microscope that
magnifies up to 40 times. This lens is used for observing fine details such as muscle striations
and retinal nerve cells.
Low Power Objective - The low-power objective on a microscope is the shortest or second
shortest objective lens found on standard laboratory microscopes. Low-power objective lenses
typically add 10x to the magnifying power of the microscope. Stage Clips - Holds slide
in place
Stage - Where slide is placed, holds slide
Diaphragm - Adjusting the amount of light striking an object.
Cuticle -
Cortex -
Follicle -
Root -
What are some things examining a hair sample can determine? - SOURCE (HUMAN OR
ANIMAL)
RACE (SOMETIMES)
ORIGIN OF THE LOCATION ON THE SOURCE'S BODY
SIGN OF STRUGGLE
Biology
What is the magnification of the ocular lens? - 10X
What is the magnification of the low power objective? - 10X
High Power? - 40X
What is the total magnification of the ocular and low power? - 100X
Ocular and high power? - 400X
Which is the only adjustment knob you should use while on high power? - Fine
adjustment
Which adjustment knob do you use on low power? - Coarse and Fine adjustment
Light Source - Light built into the base (mirror or bulb)
Ocular Lens - Magnifies the image and focuses light into your eye
How do you calculate the power of magnification? - Multiply the power of the ocular lens by the
power of the objective.
Coarse Adjustment -
Fine Adjustment -
Objective -
Base and Arm - Structural support
Inclination Joint - located at the bottom of the instrument, where the base connects to the arm.
The inclination joint allows a microscope to tilt.
, Body Tube - The microscope body tube separates the objective and the eyepiece and assures
continuous alignment of the optics.
Revolving Nosepiece - This is the part that holds two or more objective lenses and can be rotated
to easily change power. Objective Lenses: Usually you will find 3 or 4 objective lenses on a
microscope.
Objective lens - Gathers light and magnifies image
High Power Objective - A high power objective lens is an important part of a microscope that
magnifies up to 40 times. This lens is used for observing fine details such as muscle striations
and retinal nerve cells.
Low Power Objective - The low-power objective on a microscope is the shortest or second
shortest objective lens found on standard laboratory microscopes. Low-power objective lenses
typically add 10x to the magnifying power of the microscope. Stage Clips - Holds slide
in place
Stage - Where slide is placed, holds slide
Diaphragm - Adjusting the amount of light striking an object.
Cuticle -
Cortex -
Follicle -
Root -
What are some things examining a hair sample can determine? - SOURCE (HUMAN OR
ANIMAL)
RACE (SOMETIMES)
ORIGIN OF THE LOCATION ON THE SOURCE'S BODY
SIGN OF STRUGGLE
