If a person's goal is to increase his or her overall fitness, which is the most important factor: the specific areobic exercise a person does or the intensity of the exercise? Defend your response

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.