Question

10.6 The angular distance between the center and the first minimum of a single-slat Fraunhofer diffraction pattern is called the half-angular breadrk; write an expression for it. Find the coresponding hai inear width when no focusing lens is present and the distamce from the slit to the viewing screen is L Natice that the half-linear width is also the distance between the successive minima

Answer 1

ivem Data, is as follows Distance f,mn slit to vicw.my SCA, e em = L ueentt fimd half Limeas width when Let us suppase The width ‘4 smeh slit we kmeuw that SD on try 入+5 Wavelen Sim ce o mimimum Om is ne o a clon put these vabues im above Condition Sin e, tA And use knoutSmalles nngles rn!右 thacffe, we get

Half amgul a width J e rd Amge Ac Distance Radiu s AmXax Radius 드 aa ( Distan ce Since Age s 3mal RadiusニDistance betweem slit and SCAeem which is L So, that LLX JHence, we have found the es pondin eSen