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 620 nm light carry, to the nearest hundredth, Ari?

   2 eV
2. 2.

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

   3 eV
3. 3.

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

   2.48 eV
5. 4.

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

   • 13.6 eV
   • 1.89 eV
   • 4.91 eV
6. 5.

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

   Use the picture in question 4.

   • 10.2 eV
   • 17 eV
   • 3.4 eV
7. 6.

   Light through two narrow slits makes bright and dark bands. Which model explains this best, Milo?

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

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

   • The wave model
   • The photon model
   • Neither model
9. 8.

   Which statement about light do physicists accept, Pia?

   • It acts like a wave in some cases and like particles in others
   • It is a stream of tiny balls of matter
   • It is a wave with no particle behavior
10. 9.

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

    • Red light
    • They are the same
    • Blue light
11. 10.

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

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