Chemistry A-Level
complementary filter
What complementary filter means in Chemistry A-Level, as defined for AQA.
Definition of complementary filter
Check what you remember
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Reference: AQA
The filter that transmits the light the solution absorbs most strongly, being the complementary colour.
Topics that use complementary filter
- Formation of coloured ions (A-level only) (AQA A-Level)
Related terms
- absorption of visible light
- absorption spectrum
- calibration curve
- colour changes on adding reagents
- complementary colour
- filter selection
- ground state and excited state
- size of the d orbital gap
Using complementary filter in the exam
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