Wave Optics321(b) In the second order, . The second order images for the above wavelengths will be found at angles 2m=( ) [ ]11212sin2sindsinθλθ−−==mThis yields: for 479 nλ=, 220.5=°; for 647 nm=, 228.3=°; and for 698 nm=, 230.7=°24.36(a) The longest wavelength in the visible spectrum is 700 nm, and the grating spacing is 361 mm1.6710mm1.6710m600d×=×Thus, ( )6max91.6710m sin90.0sin90.02.3870010mreddm−−×°°=×so 2 complete orders will be observed. (b) From dsin=, the angular separation of the red and violet edges in the first order will be 99116670010m40010msinsinsin1.6710m1.6710mvioletddλλ−−sinred×× −=−∆= or 10.9°24.37The grating spacing is
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 12/09/2011 for the course PHYS 2020 taught by Professor Staff during the Fall '10 term at FIU.