Physics, 13.10.2019 08:00 sickboi

Which of the following would be an example of basic research?

spencer's research on wwii radar technology that led to the invention of the microwave oven.
experimenting to determine the fundamental properties of x-rays.
edison's research and use of other scientists' work to invent the light bulb.
morrison and franscioni's research done to create the frisbee.

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Which of the following would be an example of basic research?

spencer's research on wwi...