Speed of light and sound in the same medium

[Ignis Radiis]

okay, so I know that light is faster than sound, and we can prove it with many visuals, but can y'all give examples of speeds through the same medium.
For example, I know that the speed of sound is 343 in room at 20⁰ C

 

[Vanadium 50]

The internet is filled with such tables:

http://en.wikipedia.org/wiki/List_of_refractive_indices
http://hyperphysics.phy-astr.gsu.edu/hbase/tables/soundv.html
https://www.nde-ed.org/EducationResources/CommunityCollege/Ultrasonics/Reference%20Information/matproperties.htm

 

[Ignis Radiis]

The internet is filled with such tables:

http://en.wikipedia.org/wiki/List_of_refractive_indices
http://hyperphysics.phy-astr.gsu.edu/hbase/tables/soundv.html
https://www.nde-ed.org/EducationResources/CommunityCollege/Ultrasonics/Reference%20Information/matproperties.htm

Nice! Thank you...:):D