Question

question 4
when a substance absorbs certain colors of light, what happens to its visible spectrum?
some colors appear darker or missing
the whole rainbow becomes brighter
the spectrum reverses direction
it changes into infrared light

Explanation:

When a substance absorbs certain colors of light, those absorbed colors are no longer present in the visible spectrum. So, they either appear darker (if partially absorbed) or missing (if fully absorbed). The other options are incorrect: absorbing light doesn't make the whole rainbow brighter (as light is removed), the spectrum doesn't reverse direction (absorption is about color removal, not order change), and it doesn't change into infrared light (the question is about the visible spectrum).

Answer:

Some colors appear darker or missing.