When nuclear reactor design and construction first begin optimism for the technology was very high. However licensing of new nuclear reactors in the United States effectively stopped about the 1970s mostly due to the public demand explain what causes sudden shift in public opinion

See the explanation below.

Explanation:

Working with nuclear reactors involves the generation of electrical energy, by means of steam generation, to move a turbine. This action taken in the United States is because special safety requirements have to be met, as well as a plan for the collection and storage of nuclear waste. These nuclear waste takes thousands of years to disappear, therefore the need to control the construction of each of them, it is better opted for the construction of power plants such as hydropower and today wind and solar power plants. Special analyses and protocols are necessary in the operation of nuclear reactors, because if the temperature of a reactor is not controlled, a disaster similar to chernobyl can be generated.

the part of the wave he is travelling on is the crest