Fluorescent objects absorb light at one frequency (ultraviolet, for instance) and emit it again at a lower frequency (blue, for instance). In terms of the conservation of energy, explain why the emitted frequency has to be lower.

Which of the following reasons best explains why a scientist would want to replicate gregor mendel's pea plant experiment? a. to discover new aspects of the natural world b. to test the predictions of current theories c. to explain recently observed phenomena d. to test the conclusions of prior investigations