Engineering

# Engineering Physics, 2 by Chandel, Vishal Singh

By Chandel, Vishal Singh

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Additional resources for Engineering Physics, 2

Sample text

C) 27. : (c) 6. : (d) 17. : (a) 28. : (b) 7. : (a) 18. : (a) 29. : (c) 8. : (a) 19. : (d) 30. : (c) 9. : (c) 20. : (d) 3I. : (c) 10. : (b) 2I. : (a) 32. : (c) II. : (c) 22. : (d) 33.

This interpretation was first made by Max Born in 1925. The quantity p= n is termed as probability. The quantity fpd't is the probability that the particle will be found in a volume element d't = dx dy dz surrounding the point at (x, y, z) at time t. Since solution of Schrodinger's wave eqn is written as 'II (x, y, z, t) =cp (x, y, z,) eiOlt Complex conjugate of this is obtained by replacing 'I' and i by '1'* and -i respectively and vice versa. This gives '¥*(x, y, z, t ) = cp*(x, y, z) eiOlt hence '11*'11 = cp* (x, y, z) cp (x, y, z) Here cp (x, y, z) is the solution of time - independent part of Schrodinger's wave eqn.

I h - 2] app l· ymg relahvlshc -V2moeV moc 26. What is de Broglie hypothesis? J2mE 27. Give the statement of Heisenberg's uncertainty principle. Discuss its significance and importance. 28. State Heisenberg's uncertainty principle. Give an example of this principle. How does it help us to decide whether electrons exist in the nucleus or not? 29. Find the de Broglie wavelength in A for an electron of energy V eV, What will be the value if V=50V? 73 A (For V = 50 V) \$a 30. Find the energy of the neutron in units of eV whose de Broglie wavelength is 1 A.