Question

a store scanner has a red laser wavelength of 650 nm. while a green laser pointer has a wavelength of 542 μm. find the ratio of green to red wavelengths for these lasers. give your answer rounded to the nearest tenth.

Explanation:

Step1: Convert units

First, convert the green - laser wavelength to nm. Since \(1\ \mu m= 1000\ nm\), a green - laser wavelength of \(542\ \mu m\) is \(542\times1000 = 542000\ nm\).

Step2: Calculate the ratio

The ratio of the green to red wavelengths is \(\frac{542000}{650}\).

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Answer:

833.8