Complete the photoelectric rule

Exercise and reference answers

Missing parts

1. Answer

   frequency

   Choices

   1. frequency
   2. brightness
   3. duration

2. Answer

   number

   Choices

   1. number
   2. energy
   3. charge

3. Answer

   wavelength

   Choices

   1. wavelength
   2. electron
   3. photon

Complete the statement

Electrons come off only above a threshold {0}; making the light brighter raises the {1} of electrons, and each emission line holds a single {2}.

Instructions

Tap a word for each blank to complete the rule.

Explanation