Michelson measured the length of standard metre in terms of the wavelength of:
Correct answer: C. Red cadmium light
- A. Green cadmium light
- B. Violet cadmium light
- C. Red cadmium light
- D. Blue cadmium light
Explanation
Michelson measured the length of the standard meter using the interference fringes produced by red cadmium light. He used a device called an interferometer to measure the wavelength of the light and used it to determine the length of the standard meter.The interferometer creates interference patterns by splitting a beam of light into two paths, allowing them to recombine and create an interference pattern. By measuring the fringe pattern and knowing the wavelength of the light source, the length of the standard meter can be determined.
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