Accepted Answer
The wavelength of the ultraviolet radiation that has an energy of 2.19e-21 kj will be 1.36 x 10²⁹ meter.The Ultravoilet radiations fall in the wavelength range = 10⁻¹¹ m to 10⁻⁸ m.Energy of ultraviolet radiation = 2.19e-21 kJ.To calculate energy firstly we have to find frequency :as we know frequency = speed of light / wavelengthU = c / λ λ = c/U λ = 3 x 10⁸m/s / 2.19 x 10⁻²¹kj λ = 1.36 x 10²⁹ mThe wavelength of the ultraviolet radiation that has an energy of 2.19e-21 kj will be 1.36 x 10²⁹ meter.To know more about energyhttps://brainly.com/question/20567041$SPJ4