Question Info

This question is public and is used in 76 tests or worksheets.

Type: Multiple-Choice
Category: Waves and Sound
Level: Grade 9
Last Modified: 6 years ago

Waves and Sound Question

View this question.

Add this question to a group or test by clicking the appropriate button below.

Grade 9 Waves and Sound

The line from the point of incidence at 90 degrees to the optical device is the
  1. reflecting surface.
  2. normal.
  3. angle of reflection.
  4. none of the above.