During another fantastic physics lab, you shine laser light upon a diffraction grating with 643 lines/mm. You place a screen a distance of 109 cm away and observe the intensity pattern shown in the diagram below. Intensity 89.7 cm 89.7 cm 43.6 cm 43.6 cm What was the wavelength of the laser light that was used to create this interference pattern? Give your answer in units of nm. Do not enter the units in the answer box. Assume all given values are known to a precision of three significant figures.In no more than 100 words, describe the logic you used to arrive at your answer to the previous questio h. Please do not write out a step-by-step mathematical solutioninstead, explain the logic used to arrive at your answer. For example, you might want to address some or all of: What assumptions did you make? What physical relationshipsdid you need to know? Which quantities were known and unknown? Was there a key equation (or two) that you used to nd that unknown