1. Briefly explain how particle motion and wave motion are described differently
ID: 1583772 • Letter: 1
Question
1. Briefly explain how particle motion and wave motion are described differently in classic mechanics 2. Briefly explain the first experiment which demonstrated that light has the properties of waves. 3. Why does the analysis of the photoelectric effect based on classical physics predict that the kinetic energy of electrons wi increase with increasing light intensity? 4. What did Einstein postulate in the photoelectric effect? How does this postulate differ from the predictions of classical physics?Explanation / Answer
(a) particle has definite mass and it occupies particular space while wave is a packet of energy with no mass.
(B) photoelectric effect - by which electron were ejected from bounded orbits. It means light has energy thats why is a wave.
(3) increasing intensity will increase the total energy incident on surface. As a result kinetic energy of ejected electrons should increase but this is not true.
(4)einstein said that wave is bundle of energy and it has definite energy. One electron will absorb on photon and intensity of incident light will not affect kinetic energy of ejected electrons. It's frequency of incident light on which KE of electrons depends.
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