Physical Setting / Physics Regents Examinations: Solved Modern Physics Problems Using Equations

MP1.


a. EXAMPLE: If the frequency of a monochromatic light beam is 1.2 × 1015 cycles per second, what is the energy of each of its photons?


b. EXAMPLE: Calculate the energy of a photon of monochromatic orange light whose wavelength is 6.0 × 10−7 m.


MP2. Ephoton = Ei − Ef
EXAMPLE: A hydrogen atom jumps from an energy level of −0.85 eV to an energy level of −13.60 eV. What is the energy of the photon emitted as a result of this transition?


MP3. E = mc2
EXAMPLE: What is the energy equivalence, in joules, of 1.0 × 10−3 kilogram of matter?