Atomic Emissions

Question

What is the E associated with a single 748nm photon?

Answer 1

E = hc/λ

Convert 722 nm to m: 722 nm x 1 m/10⁹ nm = 722x10^-9 m = 7.22x10^-7 m

E = 6.626x10^-34 Jsec)(3x10⁸ m/sec)/7.22x10^-7 m

E = 2.75x10¹⁹ J