The Wavelength Of The Beam Separation

1290 WordsAug 20, 20156 Pages
Discussion: The graph produce a straight line that passes through the origin, with the distance between adjacent maxima ( ) and the inverse of the slit separation producing a having an equation of . This indicates that there is a direct proportionality between and . As the slit separation increased, the distance between adjacent maxima decreased, and as the slit separation decreased, the distance between adjacent maxima increases. The data from this experiment has the relationship , and by using the slope, the wavelength of the laser’s light can be calculated. The wavelength of the red laser pointer should be between 620nm and 670nm, and if the experimental value is within this range then the data can be assumed to be accurate. The function for the relationship between this experiment’s variables is in the form of the equation , it can be seen that the slope is equal to = 9.00 x 10 -7 m, and therefore the wavelength of the light produced by the laser pointer can be calculated by dividing the above value by the distance between the slits and the screen. Remembering that the measurement of L was 1.425m, the wavelength is therefore: = 632 nm (2 sig. fig.) The wavelength falls within the range of red laser pointer wavelengths and can therefore be assumed to be reasonably accurate. As the laser pointers had no recorded wavelengths, a percentage error calculation cannot be performed for accuracy assessment. The precision of the data also appears to very high as the data