Bright field microscope
The field of vision of bright field microscope is brightly illuminated and used for most microscopic work.
Bright field microscope is the simple popular form of microscope illumination techniques. Bright field microscope is usually used with compound microscopes. The light path of a bright-field microscope is brightly illuminated and very simple. The light path is composed of a transillumination light source, an objective lens, a condenser lens, and oculars to view the sample image.
You are measuring the amount of salt in the water.
Explanation:
factors in population growth include:
(1)Healthcare
(2)Availability of birth control/availability of family planning education/use of birth control
(3)Political or economic stability
(4) Food availability
Help you not eat poisonous plants :)