Question

What is the use of an interference microscope?

(a) Measure depth of scratches

(b) Measure width of crack

(c) Develop a permanent visual record

(d) Only illuminate the cracks

This question was addressed to me during an online interview.

I need to ask this question from Visual Inspection in division Machine Vision Systems of Engineering Metrology

Answer 1

Correct choice is (a) Measure depth of scratches

The explanation is: Interference microscope is used to measure the depth of scratches in the finish of finely lapped or polished surfaces. This is a nondestructive technique and is generally used in visual inspection.