51. Who is known as the father of nuclear physics?
a) Ernest Rutherford
b) Albert Einstein
c) Isaac Newton
d) Galileo Galilei
52. Who discovered the photoelectric effect?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) James Clerk Maxwell
53. Who proposed the theory of relativity?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) James Clerk Maxwell
54. Who discovered the first law of thermodynamics?
a) Rudolf Clausius
b) James Clerk Maxwell
c) Isaac Newton
d) Galileo Galilei
55. Who discovered the concept of wave-particle duality?
a) Louis de Broglie
b) Werner Heisenberg
c) Niels Bohr
d) Max Planck