4.6.2.6 Visible light

Spec reference: 4.6.2.6 (physics only).

Triple-only content in this dot

• Visible-light colour from selective absorption/reflection/transmission.
• Explain filters and apparent colour of opaque/transparent objects.

Exam quick-check

• Can I identify this as a triple-only point from wording in the question?
• Can I apply the correct equation/idea with units and a clear conclusion?