1. Find the frequency of a light wave if its wavelength is 5.415 x 10–8m.
2. What is the energy of a photon with frequency 1.45 x 1011 Hz?
3. What is the frequency of a photon with energy of 4.75 x 10–23J?
4. What is the energy of a photon with frequency 8.25 x 10–15 Hz?
5. Find the intensity of the light source necessary to produce an illumination of 3.75 ft candles at 6.75 ft from the source.
6. Find the intensity of the light source necessary to produce an illumination of 4.86 lux at 9.25 m from the source.
7. What is the intensity of the light source required to produce the illumination of Problem 13 if the distance from the light source is doubled?