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Default values will be entered for unspecified parameters, but all values may be changed. The data will not be forced to be consistent until you click on a quantity to calculate. This calculation is designed to allow you to enter data and then click on the quantity you wish to calculate in the active formula above. This resolvance implies that the wavelength resolution is

If N = slits are illuminated, then the resolvance R =. The resolvance of such a grating depends upon how many slits are actually covered by the incident light source i.e., if you can cover more slits, you get a higher resolution in the projected spectrum. The displacement from the centerline for maximum intensity will be Projected on a screen at distance D = cm, The equation is shown below: Figure 3 illustrates this diffraction. The slit separation is d = micrometers = x10^ m.įor incident light wavelength λ = nm at order m = , The basic grating equation determines the discrete directions into which monochromatic light of wavelength is diffracted. However, angular separation of the maxima is generally much greater because the slit spacing is so small for a diffraction grating.ĭisplacement y = (Order m x Wavelength x Distance D)/( slit separation d)įor a diffraction grating with lines/mm = lines/inch, The condition for maximum intensity is the same as that for a double slit. A diffraction grating is the tool of choice for separating the colors in incident light.