Quantum Mechanics Answers

Describe one method by which the speed of light can be measured, explaining how the result is calculated from the observations. Describe one practical situation in which a knowledge of the speed

       of light, or other electromagnetic radiation is needed.

Electrons are emitted with zero velocity from a certain metal surface when it is exposed to radiations of lamda=6800A. Calculate threshold frequency and work function of metal.

Consider the Mungo River where it is 200

meters wide and has a uniform flow. A small

boat sailing at full speed takes 5 minutes to

cover 100 meters when sailing upstream, but

only 2 minutes when sailing downstream. What

is the shortest time in which the boat can cross

the Mungo to the nearest point on the opposite

bank?

 Show that < 𝑥𝑝 > − < 𝑝𝑥 > = 𝑖ħ for the ground state wave function of the Quantum 

Harmonic Oscillator (QHO)

a spring has a force of 80 n/m, it vibrates with a frequency of 7 Hz, Calculate the, a) period b)angular frequency; c) mass of the spring.

Write the degeneracy of isotropic 3 dimensional harmonic oscillator.

Explain spectroscopic notation.

Planet X is approximately 1.50x10• meters alway from planet z calculate the magnitude of the force attraction between Planet X and planet Z

What is result of sigma x. Sigmay

What is sigma y matrix