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A laser of known wavelength is directed at a thin strand of hair.

Which of the following best describes a method to determine the width of the strand of hair?

A

Measure the distance from the hair to a screen in which a diffraction pattern is observed. Measure the intensity of the brightest spot of light. Use these measurements, along with the laser's wavelength to solve for the width of the hair.

B

Measure the distance from the laser to the hair. Measure the average distance between the diffraction pattern peaks (bright spots of light). Use these measurements, along with the laser's wavelength to solve for the width of the hair.

C

Measure the distance from the hair to a screen in which a diffraction pattern is observed. Measure the average distance between the diffraction pattern peaks (bright spots of light). Use these measurements, along with the laser's wavelength to solve for the width of the hair.

D

Measure the distance from the laser to the hair. Measure the intensity of the brightest spot of light. Use these measurements, along with the laser's wavelength to solve for the width of the hair.

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