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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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        Summary 
        
         
          
           | Description | 
           Hydrogen Spectra.jpg
             English: H2 spectra using a 600lpm diffraction grating. 
             
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           | Date | 
           18 April 2010 | 
          
          
           | Source | 
           Own work ( Teravolt)  Transferred from  en.wikipedia | 
          
          
           | Author | 
            Teravolt at  en.wikipedia | 
          
         
         
        Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
              | 
          This work has been released into the  public domain by its author,  Teravolt at the  English Wikipedia project. This applies worldwide.
 In case this is not legally possible:  Teravolt grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. 
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          | Public domainPublic domainfalsefalse | 
         
        
        
         
            | 
          This file is ineligible for  copyright and therefore in the  public domain, because it consists entirely of information that is common property and contains no original authorship. | 
         
        
        
       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
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