Match each term to its meaning

Exercise and reference answers

Matching pairs

1. Left

   Hertz

   Right

   One wave cycle per second

2. Left

   Node

   Right

   A point that never moves

3. Left

   Angstrom

   Right

   A tenth of a nanometre

4. Left

   Threshold

   Right

   Lowest frequency that ejects

5. Left

   Emission line

   Right

   One single wavelength of light

Instructions

Tap a term on the left, then tap its meaning on the right.

Explanation