<p> Name: ______Leveled , υ & Energy Calculation Practice</p><p>Equations & constants C = 2.998 x 108 m/s H = 6.626 x 10-34 Js c =υ E = hυ</p><p>These homework problems will help you test your own knowledge of the material above. They are leveled and get increasingly harder. Show all work for credit! Level 1 1) If a wave has a frequency of 9.05 x 1015 Hz; calculate its wavelength in nm.</p><p>2) Use the spectrum above to identify what type of radiation is discussed in question 1. ______</p><p>3) One type of sunburn occurs on exposure to UV light of wavelength 325nm. Calculate the frequency of this dangerous wave. </p><p>4) Sodium vapor lamps are often used in residential street lighting. They give off a yellow light having a frequency of 5.09 X 1014 Hz. What is the wavelength of this signal in nanometers?</p><p>5) Radiation used in hospitals has a frequency of 3×1016 Hz. Calculate the wavelength of this energy in nanometers.</p><p>6) Use the spectrum above to identify what type of radiation is discussed in question 5. ______Level 2 7) From question #3; burning radiation from the sun has a wavelength 325nm. What is the energy of a photon of this wavelength?</p><p>8) Calculate the energy of waves from an AM radio station that has a frequency of 1210 kHz (that’s kilohertz, so you must convert to hertz to get correct answer).</p><p>9) It requires a photon with a minimum energy of 4.41 x 10-19J to emit electrons from sodium metal. What is the minimum frequency of light necessary to emit electrons (In Hz)?</p><p>Level 3 10a) What wavelength (in nm)of radiation has photons of energy 2.87 x 10-18J? </p><p>10b)In what portion of the electromagnetic spectrum would this radiation be found? ______</p><p>11) Sun tan lotion does the job of protecting us from UV-B waves that have a wavelength of approximately 280nm. What is the frequency and energy associated with those waves? </p>