Which statement about the substage condenser is true?
a. The substage condenser functions to direct a hair beam of the desired
numerical aperture (N.A.) and field size onto the specimen.
b. The size of the opening in the condenser together with its position up or down
controls the light entering the system.
When the condenser is open to the stage, concentration of light is greater.
d. As the condenser is moved upward, less light passes downward through the
object under observation.
a. Light points appear on the outer edges of the slide.
b. The center of an object is bright on one side and dark on the other.
The object appears to be in dull light
d. Shadows appear in the field.
Which three parts of a microscope may be adjusted to control the illumination?
a. Mirror, iris diaphragm, and ocular.
b. Mirror, iris diaphragm, and objective.
Mirror, iris diaphragm, and condenser.
d. Ocular, objective, and condenser.