I see their reasoning that since yellow is the color seen, purple must be absorbed.

However, the light chapter in TBR distinguishes between emitted colors and reflected colors, explaining that only reflected colors (IE, those seen from objects you can't see at night) follow this rule. Emitted colors (IE, those you can see at night, like light bulbs, TV screens) absorb and display the same color. How do you decide in this case whether this is an emitted or reflected color? Is it just because the color was produced via spectroscopy? So spectroscopy works by producing reflected colors?


  • nmk.PNG
    108.9 KB · Views: 20
  • passage 7.PNG
    passage 7.PNG
    136.9 KB · Views: 19


Full Member
2+ Year Member
Jul 4, 2017
Status (Visible)
  1. Medical Student
Reflected light is when light say hits an apple and we see red. Emitted light is the source; in this case the sun that hit the apple. For this problem, an outside source emitted light which strikes this reaction; compound 2 absorbs the purplish component and what is reflected is yellow.
This thread is more than 3 years old.

Your message may be considered spam for the following reasons:

  1. Your new thread title is very short, and likely is unhelpful.
  2. Your reply is very short and likely does not add anything to the thread.
  3. Your reply is very long and likely does not add anything to the thread.
  4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
  5. Your message is mostly quotes or spoilers.
  6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
  7. This thread is locked.