Which of the following is true for checking of slip gauges with interferometer?

Both ends of gauges examined simultaneously

Right end is examined first

Left end is examined first

Any end can be examined after one another

Correct Answer: Both ends of gauges examined simultaneously

The absolute measurement and gauge comparison are done by an interferometer. It consists of a higher interferometer arranged in such a way that both ends of this type of gauge are checked simultaneously in the same area of view.