<Table> <Tr> <Th> Values of h </Th> <Th> Units </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 6966662607004000000 ♠ 6.626 070 040 (81) × 10 </Td> <Td> J ⋅ s </Td> <Td> </Td> </Tr> <Tr> <Td> 6985413566766200000 ♠ 4.135 667 662 (25) × 10 </Td> <Td> eV ⋅ s </Td> <Td> </Td> </Tr> <Tr> <Td> 2π </Td> <Td> E ⋅ t </Td> <Td> </Td> </Tr> <Tr> <Th> Values of ħ (h - bar) </Th> <Th> Units </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 6966105457179999999 ♠ 1.054 571 800 (13) × 10 </Td> <Td> J ⋅ s </Td> <Td> </Td> </Tr> <Tr> <Td> 6984658211951400000 ♠ 6.582 119 514 (40) × 10 </Td> <Td> eV ⋅ s </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> E ⋅ t </Td> <Td> </Td> </Tr> <Tr> <Th> Values of hc </Th> <Th> Units </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 6975198644568000000 ♠ 1.986 445 68 × 10 </Td> <Td> J ⋅ m </Td> <Td> </Td> </Tr> <Tr> <Td> 7000123984193000000 ♠ 1.239 841 93 </Td> <Td> eV ⋅ μm </Td> <Td> </Td> </Tr> <Tr> <Td> 2π </Td> <Td> E ⋅ l </Td> <Td> </Td> </Tr> <Tr> <Th> Values of ħc (h - bar) </Th> <Th> Units </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 6974316152649000000 ♠ 3.161 526 49 × 10 </Td> <Td> J ⋅ m </Td> <Td> </Td> </Tr> <Tr> <Td> 6999197326970000000 ♠ 0.197 326 97 </Td> <Td> eV ⋅ μm </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> E ⋅ l </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Values of h </Th> <Th> Units </Th> <Th> Ref . </Th> </Tr>

What are the units for planck's constant
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