How do ethical concerns affect scientific research? A. Scientists should not be forced to let other people's ethics limit
their research.
B. Scientific research must not hurt people or animals.
O C. Scientists should not let their own ethics interfere with their
research.
D. Scientists should set aside ethical concerns when doing research.

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.