Who was the first scientist to propose that an object could emit only certain amounts of energy?
A) Planck
B) Einstein
C) Bohr
D) Rydberg
E) de Broglie
Answer: A
Who was the first scientist to propose that an object could emit only certain amounts of energy?
A) Planck
B) Einstein
C) Bohr
D) Rydberg
E) de Broglie