Question

1- The solution of equation of motion in monoatomic chain is represented by (a)sounds wave (b) Traveling wave (c) Transverse wave (d) Longitudinal wave 2- When the atoms gain more thermal energy (a) The phase increases (b) The amplitude increases (c) The phase decreases (d) The amplitude decreases 3- the small amplitude limit of lattice vibration is known (a) Un harmonic limit (b) Harmonic limit (c) Displacement limited (d) Frequency limit

Answer 1

1.

The solution of equation of motion in monoatomic chain is travelling wave.

Thus, option (b) is correct.

2.

When the heat given any material or atom than the kinetic energy of the atoms will increases which results increase in the amplitude of the vibrations of the atom.

Thus,when the atoms gain more thermal energy thier amplitude of vibration increases.

Thus, the option (b) is correct.

3. The small amplitude limit of the lattice vibration is called Harmonic limit.

Thus, the option (b) is correct.

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