3000A    4000A    5000A    6000A    7000A    8000A    9000A    10000A
             300nm    400nm    500nm    600nm    700nm    800nm    900nm    1µm     1.2µm      1.6µm     2.1µm                                         
             ---------------------------------------------------------------------------------------------------------> 
                 U u      B g        V       r R       i I       z                   J          H         K         filtres Simbad
                          B=F435W    V=F555W r=F625W   i=F775W   z=F850LP            J=F110W    H=F160W             filtres HST
                          g=F475W    V=F606W           I=F814W                                                      filtres HST
           ___________________________                                   ____________________________________                                              
                                      |                                 |
                                      |                                 |
             0.01nm    10nm      380nm(3800A)    700nm(7000A)   1µm   2.5µm  30µm  300µm  1mm/300GHz   1cm/30GHz    1m/ 300MHz       longueur d'onde                                               
        --------|--------|----------|----------------------------|-------|-----|-----|---------|-----------|---------|----------------> 
         Gam         X        UV             Opt                    NIR    MIR   FIR     smm        mm      micro-onde                                            
                                                                                                            -------------Rad---->