1. One of the electron transitions in a hydrogen atom produces infrared light with a wavelength of 7.464 x 10 -6 m. What amount of energy causes this transition? 2. Find the energy in kJ for an x-ray photon with a frequency of 2.4 x 1018 1/s.

3. A ruby laser produces a red light that has a wavelength of 500nm. Calculate its energy in joules.

4. What is the wavelength and frequency of a photon with an energy of 1.4 x 10-21J?

your answers are a,b,,e and f

i hope this

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.