Wavelength = (speed) / (frequency)
Wavelength = (8 m/s) / (2/s)
Can you finish it off from this point ?
The answer to this question is a the estimate the speed of light
The US English System of measurement grew out of the manner in which people secured measurements using body parts and familiar objects. For example, shorter ground distances were measured with the human foot and longer distances were measured by paces, with one mile being 1,000 paces. Capacities were measured with household items such as cups, pails (formerly called gallons) and baskets.
Your answer is B. The human eye can only detect color and Tv waves
