11. Who discovered the law of reflection of light?
a) Isaac Newton
b) Galileo Galilei
c) Johannes Kepler
d) Christiaan Huygens
12. Who discovered the law of refraction of light?
a) Isaac Newton
b) Galileo Galilei
c) Johannes Kepler
d) Christiaan Huygens
13. Who discovered the first law of motion?
a) Isaac Newton
b) Galileo Galilei
c) Johannes Kepler
d) Christiaan Huygens
14. Who discovered the second law of motion?
a) Isaac Newton
b) Galileo Galilei
c) Johannes Kepler
d) Christiaan Huygens
15. Who discovered the third law of motion?
a) Isaac Newton
b) Galileo Galilei
c) Johannes Kepler
d) Christiaan Huygens