Quantum Mechanics Answers

Assuming Heisenberg Uncertainty Principle to be true what could be the minimum uncertainty in de-Broglie wavelength of a moving electron accelerated by potential difference of 6 Volts whose uncertainty in position is n.m.

A 55kg woman bungee jumps from a bridge and reaches a maximum velocity of 24.2m/s. The bridge is 60m above the water. When the woman is at the bottom of her trajectory, she is 9 m above the water.
What is the spring constant of the bungee cord?

Q. show that ∆E/E = hf’/moc2(1-cos ө )

Q. A 511 kev gamma ray photon is Compton scattered form a free electorn in an aluminium block. What is wavelength of incident photon? What is wavelength of scattered photon? What is energy of scattered photon?

Q. Photons of wavelength of 2.17pm are incident on free electron (a) find wavelength of photon that is scattered at 350 from the incident direction.

Q. Find frequency, wavelength and momentum of photon whose energy is equal to rest energy of electron.

Q. A particular x-ray photon has wavelength of 41.5pm. Calculate photon (a) energy, (b) frequency, (c) momentum.

Q. The x-rays with λ= 100pm are scattered from a carbon target. The scattered radiation is viewed at 900. What K.E is imparted to recoiling electron?

Q. The energy needed to remove an electron from metallic sodium is 2.28ev. Does sodium show photo electric effect for red light having wavelength λ= 678 nm. What is cut off wavelength for photoelectric emission from sodium?

Q. Show that energy E of a photon having wavelength λ can be written as E= (1240ev/ λ)nm.