Question

Accepted Values of Wavelength, A (nm) Experimental Values of Sin(0) From your experiment 0.265 0.283 0.292 0.305 0.347 0.399 450 nm 465nm 495 nm 520nm 5.75nm 625nm Plot a graph of accepted values of wavelength (y-axis) and experimental Sin(0) (x-axis). Draw a linear trendline. Note down the slope of the line. y = 1341.7% + 98.794 slope = 1341.7 a. What does the value of slope tell us about the characteristics of the diffraction grating used in the experiment?

Answer 1

Wavelength (nm) 690 640 590 540 490 440 0.26 0.28 0.30 t REO he o 98.0 0.387 sino → we know, Slope - Wavelength sino - sino sino = 1341.7 We know, when light is normally incident on grating the diffracted right has maxima dsino = nd in= 1, 2, 3 ... for nal, asino=1: d = 1 - ② sino from ① & ② Id=134114 d is the distance between Slits.