Light from either an external or internal (within the microscope body) source is first passed through the substage condenser , which forms a well-defined light cone that is concentrated onto the object ( specimen ).
(the substage condenser; forms; a well-defined light cone that is concentrated onto the object ( specimen )) (a well-defined light cone; is concentrated; onto the object ( specimen)
the substage condenser a well-defined light cone
forms is concentrated
a well-defined light cone that is concentrated onto the object ( specimen )
onto the object ( specimen