Because they wanted a big pocket bank of their own to finance the growing
Answer:
The oblique illumination is
used by the microscopists to resolve N. Spencrii in the Dark Field Condensers.
Explanation:
It was found that the use of oblique light was required to resolve the striae. Oblique illumination was the first step toward dark field microscopy. In dark field, light
seems to radiate from the specimen while all the rest of the field is black. Resolution is as good as that in bright field while contrast is enhanced.
In dark field microscopy, no
direct light from the condenser enters the objective lens. Only light
that is reflected, refracted or diffracted by the specimen enters the objective. The dark field condenser produces a circle of light. The
light is at an extremely oblique angle to the surface of the slide. This
oblique light comes to a focus on the specimen. It then diverges so
strongly that no direct light enters the objective. This type
of illumination is a hollow cone of light.
Answer:
C. The increased importance of industrialization.
Explanation:
The rapid development of cities was due to the growth of industrialization. Industrialization was increasingly demanding labor, so people moved from the countryside to the city in search of better living conditions and income. Particularly in the US, nineteenth-century industrial development ,and consequent urbanization ,were very much driven by the development of railways, which gave industry conditions to lower production and transportation costs in order to develop more rapidly.
