Q:
      
      
         
            
Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: C) homogeneous and transparent         
         
Explanation: In vacuum and in homogeneous, transparent media, such as air, water, and glass, light moves in a straight line. When light encounters a boundary between two different transparent media, some light is reflected and some moves from the first into the second medium.
       
      
      
      
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