Electrons and Photons
1. Discuss the physical
principles Invovoled in Milikan's experiment for the determination of the
charge of an electron.
Ans: The physical principles
involved in Millikan's experiment for the determination of the charge of an
electron are as follows:
i) Oil drops get ionized due to
friction.
ii) A charged particle
experienced force in an electric field.
2. Cathode rays cannot be
regarded as electromagnetic waves. Why?
Ans: Cathode rays cannot be
regarded as electromagnetic waves because of all the elements. Cathode rays are
defected by electric and magnetic fields but electromagnetic waves do not.
Also, cathode rays do not show the nature of electromagnetic waves. Hence, they
cannot be regarded as electromagnetic waves.
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