For numbers 11-15, use the letters in the figure to answer the question.
Les:
D
B
C
G
11. It facilitates the changing of objectives.
12. It supports the body tube.
13. Which connects the
eyepiece to the revolving nosepiece.
14. This raises and lowers the body tube and with the objectives.
15. It reflects light up to the diaphragm, object to be observed and lenses
