Light as a wave and as a particle

Answer Key - Grade 11 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   With hc = 1239.84 eV·nm, what energy does one photon of 413 nm light carry, to the nearest hundredth, Bo?

   3 eV
2. 2.

   With hc = 1239.84 eV·nm, what energy does one photon of 500 nm light carry, to the nearest hundredth, Esme?

   2.48 eV
4. 3.

   In the photon diagram, what energy does the photon from the n = 3 to n = 2 drop carry, Jun?

   • 4.91 eV
   • 1.89 eV
   • 13.6 eV
5. 4.

   In the photon diagram, what energy does the photon from the n = 2 to n = 1 drop carry, Kira?

   Use the picture in question 3.

   • 10.2 eV
   • 17 eV
   • 3.4 eV
6. 5.

   In the photon diagram, which drop gives the higher-frequency photon, Luz?

   Use the picture in question 3.

   • n = 2 to n = 1
   • n = 3 to n = 2
   • They are the same
7. 6.

   Light knocks electrons out of a metal only above a certain frequency. Which model explains this best, Noah?

   • The wave model
   • Neither model
   • The photon model
8. 7.

   Which statement about light do physicists accept, Pia?

   • It is a stream of tiny balls of matter
   • It acts like a wave in some cases and like particles in others
   • It is a wave with no particle behavior
9. 8.

   Which carries more energy per photon: blue light or red light, Ren?

   • Blue light
   • Red light
   • They are the same
10. 9.

    A red lamp is made brighter. What changes about its light, Tala?

    • Each photon carries more energy
    • The light turns blue
    • More photons each second
11. 10.

    What sets the energy of a single photon, Zee?

    • Its frequency
    • How far it travels
    • The lamp's brightness