What structure does light pass through after leaving the condenser in a compound light microscope?

Suppose you were asked to find the torque about point p due to the normal force n in terms of given quantities. which method of finding the torque would be the easiest to use?

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.

What is the frequency if a wave that pases a given pount 22 times in 2 seconds