Quantum Mechanics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 39  41 of 80
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Question number: 39
» Quantum Mechanics » SpinStatistics Connection
Appeared in Year: 2014
Question
Let, where are the Pauli matrices. If and are two arbitrary constant vectors in three dimensions, the commutator is equal to (in the following I is the identity matrix). (December)
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Question number: 40
» Quantum Mechanics » SpinStatistics Connection
Appeared in Year: 2013
Question
Consider three particles A, B and C each with an attribute S that can take two values Let and at a given instant. In the next instant, each S value can change to with probability . The probability that remains unchanged is – (June – 2013)
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Question number: 41
» Quantum Mechanics » Elementary Theory of Scattering » Phase Shifts
Appeared in Year: 2014
Question
A double slit interference experiment uses a laser emitting light of two adjacent frequencies and . The minimum path difference between the interfering beams for which the interference pattern disappears is – (June 2014)
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