An electron microscope operates with a beam of electrons, each of which has an energy of 20 KeV. Use the uncertainty principle in the form delta(x)delta(p) (greater or equal to) h/2 to find the smallest size that such a device could resolve. Planck's constant is 1.0552 × 10^-34 J · s. Answer in units of pm.
What must the energy of each neutron in a beam of neutrons be in order to resolve the same size object?
Answer in units of eV.
A beam of neutrons with a kinetic energy of 0.0002 eV falls on a slit of width 0.0001 m.
The Planck's constant is 6.63 × 10 ^-34 J · S.
What will be the angular spread of the beam after it passes through the slit?
Answer in units of radian.© BrainMass Inc. brainmass.com October 24, 2018, 10:09 pm ad1c9bdddf
Here are the solutions to this problems set.
However, I must say I'm confused regarding the way the first problem is to be solved. It is stated that it should be solved using the uncertainty principle, while a more reasonable approach is the ...
This solution provides step by step calculations for various questions involving Planck's constant.
Laser Behavior & Wavelength Calculations
Please see various quantum questions on wavelengths and laser behavior attached.
Showing work or giving explanations would be much appreciated.