Answer:
photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.
Scientists use curiosity, imagination, and previous scientific study to
create research questions and hypotheses to begin their investigations
into natural phenomenon. They use this process which formally is called
the scientific method to carefully construct experiments to guide
investigations of the world around them. Hope this helps!!
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