In flame photometry, which color corresponds to calcium emission?

• A. Brick Red
• B. Red
• C. Orange
• D. Yellow

Answer: (A)

In flame photometry, light from excited atoms appears in characteristic colors specific to each element. Calcium has a strong emission color in the red-orange region that is commonly described as brick red, due to its distinctive emission lines. This brick red signal is how calcium is identified and quantified in the flame. The other colors correspond to emissions from different elements, so brick red best matches calcium emission.