Question

15. Excited sodium atoms emit light in the infrared at 589 nm. What is the energy of a single photon with this wavelength?

Answer 1

3.36 × 10^-19 J

Step-by-step explanation:

From the formula;

E= hc/wavelength

h= 6.6 ×10^-34 Js

c= 3 × 10^8 ms-1

Wavelength= 589 ×10^-9 m

E= hc/ wavelength

E=6.6 ×10^-34 × 3 × 10^-8/ 589 ×10^-9

E= 3.36 × 10^-19 J