Which of the following sources of information is most reliable?
opinion section of a newspaper
a publicly run news website
a blog of a popular celebrity
federal government website
The most reliable source of information among the options provided is a federal government website. These websites are typically subject to rigorous fact-checking processes and adhere to high standards of accuracy and credibility. However, it is always important to critically evaluate information from any source and corroborate it with other reliable sources whenever possible.
Use the paragraph to answer the question.
The photoelectric effect happens when light waves are absorbed by a surface and electrons are emitted. Scientists once thought that the energy of those electrons was proportional to the intensity of the light. However, experiments showed that the maximum energy of the electrons did not depend on the intensity of the light. Instead, the energy increased as the frequency of the light increased. Below a certain frequency, the effect did not occur.
What can be inferred from the paragraph?
The maximum energy of electrons does not depend on light intensity.
Energy increases as frequency of light increases.
Electrons are released when light hits a surface.
The absorption of light causes electrons to gain energy.