Calculate the resolved shear stress on the (111)[011] slip system of a unit cell in an fcc nickel single crystal if a stress of 13.7 mpa is applied in the [001] direction of a unit cell.

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object