Question

wilhelm conrad roentgen discovered x - ray by: observing an x - ray produced with high voltage inventing a high - voltage generator developing a high - voltage generator observing light emitted from a chemical compound question 2 (1 point) saves thomas edison contributed greatly to radiology by: discovering the use of calcium tungstate discovering radioactivity developing the valve tube discovering radium

Explanation:

Question 1 (Wilhelm Conrad Roentgen discovered X - ray by):

Wilhelm Conrad Roentgen discovered X - rays while observing the radiation produced when high - voltage electricity was passed through a vacuum tube. The option "observing as X - ray produced with high voltage" aligns with this discovery process. The other options: inventing a high - voltage generator is not related to the discovery of X - rays (he used existing high - voltage setups), developing a high - voltage generator is also incorrect as the discovery was about observing the radiation, and observing light emitted from a chemical compound has nothing to do with X - ray discovery.

Thomas Edison contributed to radiology by discovering the use of calcium tungstate. Calcium tungstate was used in early X - ray screens. Discovering radioactivity was done by Becquerel, developing the valve tube is not Edison's contribution to radiology, and discovering radium was done by the Curies.

Answer:

A. observing as X - ray produced with high voltage (assuming the first option is A, adjust the identifier based on actual numbering)

Question 2 (Thomas Edison contributed greatly to radiology by):