what is the energy of a photon of infrared radiation with a frequency of 2.53 ×  1012  hz? planck’s constant is6.63 ×  10–34  j • s.a. 1.68 ×  1023  j        b. 1.68 ×  1047  j      c. 1.68 ×  10–21  j        d.  1.68 ×  10–45  j

Answer : The energy of a photon of infrared radiation is,

Solution :

Formula used :

where,

E = energy of a photon = ?

h = Planck's constant =

= frequency of a photon =

Now put all the given values in this formula, we get the energy of a photon.

Therefore, the energy of a photon of infrared radiation is,

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.