(1-1)               Cormorant’s disco light emits in the wavelength range 350 – 400 nm. Your laser operates at 633 nm. Planck’s and Einstein’s work led to a simple equation that relates a photon’s energy to its wavelength:  E = hc/λ, where E is photon energy, h is Planck’s constant, c is the speed of light and λ is the wavelength.  The dissociation energy of a Cl-Cl bond is 243 kJmol-1.

Use this information to see if you can confirm Nefertiti’s explanation of Cormorant’s triumph (and your abject failure) in exploding the hydrogen/ chlorine mixture. You are likely to the need these numbers: 

Planck’s constant:  6.626 x 10-34 Js;    Avogadro’s constant:  6.022 x 1023 mol-1; speed of light: 3.00 x 108 ms-1).