And in 1921, was awarded the Nobel Prize for the discovery of the law of the photo-electric effect.
A. Max Planck
B. Niels Bohr
C. Isaac Newton
D. Albert Einstein
E. Joseph Fraunhofer
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According to the notions of classical physics, the steel should emit more and more light energy as its temperature increases, until finally it starts emittingradiation, which the human eye cannot see.
A. red light
B. blue light
C. ultra-violet
D. white light
E. infrared
This quantization of radiation is analogous to water flowing in droplets rather than in a continuous stream.
A. ray
B. energy
C. light
D. heat
E. field
社区的构成要素不包含( )
A. 人口
B. 资金
C. 文化
D. 结构
农村什么时候实现了人民公社化?
A. 1949
B. 1950
C. 1958
D. 1956