What does it mean when someone has done multiple trials?
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OA. They have performed an experiment that can only be performed once.
OB.
They have performed an experiment once and reported their findings.
OC.
They have designed an investigation to answer a question.
OD.
They have performed a scientific experiment more than once.
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Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.