The correct answer is: C. Romer
Galileo Galilei (1564-1642) was an Italian astronomer, physicist, and engineer who made
fundamental contributions to the sciences of motion, astronomy, and strength of materials and to the development of the scientific method. He also made revolutionary telescopic discoveries, including the four largest moons of Jupiter.Isaac Newton (1643-1727) was an English physicist and mathematician who is considered one of the most influential scientists of all time and the greatest scientist of the 17th century. He is best known for his discovery of the laws of motion and universal gravitation, which formed the basis of classical mechanics.
Ole Rømer (1644-1710) was a Danish astronomer who is credited with being the first person to measure the speed of light. He did this by observing the eclipses of Io, one of Jupiter’s moons.
Albert Einstein (1879-1955) was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics). He is best known for his massâenergy equivalence formula E = mc2, which has been dubbed “the world’s most famous equation”. He received the 1921 Nobel Prize in Physics “for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect”, a crucial step in the development of quantum theory.
In 1676, Rømer observed that the time it took for Io to orbit Jupiter was slightly longer when the Earth was moving away from Jupiter than when it was moving towards Jupiter. He realized that this was because the light from Io had to travel further when the Earth was moving away from Jupiter, and he used this to calculate the speed of light to be about 225,000 kilometers per second. This was a very impressive achievement for the time, and it was the first accurate measurement of the speed of light.