Question

The Sun's atmosphere contains vast quantities of Het cations. These ions absorb some of the Sun's thermal energy, promoting electrons from the Het ground state to various excited states. A Het ion in the fifth energy level may return to the ground state by emitting three successive photons: an infrared photon (a = 1014 nm), a green photon (a = 469 nm), and an X ray (a = 26 nm). Calculate the excitation energy (in J) for the Het ion immediately before it emits the green photon.

Answer 1

Filth ------ energy level Ej (1R photou) Etotal Ez (green photon) Erequired E₂ (xray photon) Ground---- state The process described in the question is represented in the above pictwie. From the above picture, the we can see that the excitation enengy for thie Het jou immediately before it emits the green photon encan be is equal to Enequined which is calculated as follows - Enequined - Etotal - Ei - (E,+&+E3) -E, = E₂ +E3 Now, energy of electromagnetic waves are given by the formula - E- her whene, h= planck's constant (6.626 x10 % J.S) C- speed of light in vacuum (34108 ms'y t- wavelength (m) 39 :: Enequined - E2+ E3 - he he (:1 nm 10 m) 469x109 * 26X16-9 6.626x1024 x3x10° (etcette) XMh. 3.069 x1018 J Canswer) 109