Microscopes use two systems: The mechanical system and the optical system. Which of the following are not part of the optical system? a. condenser

b. light source

c. revolving nose piece

d. objectives

e. ocular lens

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.