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Which of the following is not true about interferometry?

41. Which of the following is not true about interferometry?

1. Interferometry is a technique that works by splitting the beam of light into separate beams
2. Interferometry is a contact measurement method, which means it involves the physical touch
3. Interferometry is extremely sensitive and can detect changes at the microscopic level
4. None of the above

Answer

The correct answer is: B) Interferometry is a contact measurement method, which means it involves the physical touch

Explanation

Interferometry is a technique that works by splitting the beam of light into separate beams. It is a non-contact measurement method, which means it does not involve any physical touch. This technique is extremely sensitive and can detect changes at the microscopic level.