Lab Quiz #1

Question 1

Parfocal

Answer 1

Property of microscope which allows objectives to be changed with minimal or no refocusing

Question 2

Total magnification

Answer 2

Objective magnification (4x, 10x, 40x, 100x)

Question 3

Working distance

Answer 3

Distance between the objective and the object being viewed

Question 4

Deep of focus

Answer 4

Thickness of specimen that can be seen in focus at one time

Question 5

Refractive index

Answer 5

-Measure how much the speed of light is reduced inside a medium such as glass;

• the refractive index of air and glass are different enough so that light waves change direction when they cross the Interfraternity from air to the glass
• this then necessitates the use of immersion oil with our 100x oil immersion objective