Question 1

What is 421 nm in eV?

Accepted Answer

421 nm = 2.945 eV. Use the converter on this page to convert to other photon energy units instantly.

Question 2

How do you convert nm to eV?

Accepted Answer

Formula: E(eV) = 1239.84 ÷ λ(nm) · f(THz) = E(eV) × 241.799 · E = hc/λ = hf. Multiply your nm value by the appropriate factor to get eV, or use the interactive converter above.

Question 3

What is 2.945 eV in nm?

Accepted Answer

2.945 eV = 420.999 nm.

nm	eV
406 nm	3.0538
411 nm	3.0166
416 nm	2.9804
421	2.945
426 nm	2.9104
431 nm	2.8767
436 nm	2.8437

421 nm to eV

Formula