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Secondary focal point #2 HTML5


Ray diagram using the secondary focal points.

The “handle” on the black ray allows you to change the angle of incidence. Click three times on “play” to activate each of the three steps in the construction.

Click and drag the handle to modify the incidence angle.

Click three times on to show the construction step by step.

Learning goals

  • To illustrate the ray tracing method using the secondary focal point