# List all the constants
print(universalConstants)
# Data for the speed of light
universalConstants["c",]
# Return the speed of light in m.s-1
universalConstants["c","Value"]
# Return the Planck constant in J.s
universalConstants["h","Value"]
# Return the Planck constant in eV.s
Joule2electronVolt(universalConstants["h","Value"])
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