The product of (wavelength) times (frequency) is always the same number ... 
the speed of the wave in whatever material it's traveling through.  So if the 
frequency is increased, then the wavelength must <em><u>de</u></em>crease by the same 
factor, in order to keep the product the same.
        
             
        
        
        
Both particles and big objects will be influenced by each other less if they are moved further apart.