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At what speed is an electron's de Broglie wavelength 1.0 pm?

Express your answer with the appropriate units.

Part B

At what speed is an electron's de Broglie wavelength 1.0 nm?

Express your answer with the appropriate units.

Part C

At what speed is an electron's de Broglie wavelength 1.0   m?

Express your answer with the appropriate units.

Part D

At what speed is an electron's de Broglie wavelength 1.0 mm?

Express your answer with the appropriate units.

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B. Haranadh Kumar
B. Haranadh KumarLv10
27 Sep 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

3. a) Show that the phase velocity of the de Broglie waves of aparticle of mass m and de Broglie wavelength ? is given by .
b) Compare the phase and group velocities of an electron whose deBroglie wavelength is exactly 1x10-13 m.
4. To what voltages must we accelerate electrons (as in an electronmicroscope, for example) if we wish to resolve;
a) a virus of diameter 12 nm , b) an atom of 0.12 nm, c) a protonof diameter 1.2 fm?
5. a) The x-coordinate of an electron is measured with anuncertainty of 0.20 mm. What is the x- component of the electron’svelocity, vx, if the minimum percentage uncertainty in asimultaneous measurement of vx is 1.0%.
b) Repeat part (a) for a proton. 6. Suppose Fuzzy, a quantummechanical duck, lives in a world in which h = 2? J.s. Fuzzy has amass
of 2.0 kg and is initially known to be within a region 1.0 mwide.
a) What is the minimum uncertainty in his speed? b) Assuming thisuncertainty in speed to prevail for 5.0 s, determine theuncertainty in position after
this time.
7. The seeing ability, or resolution, of radiation is determined byits wavelength. If size of an atom is of the order of 0.1 nm, howfast must an electron travel to have a wavelength small enough to“see” an atom?
8. An air rifle is used to shoot 1.0 g particles at 100 m/s througha hole of diameter 2.0 mm. How far from the rifle must an observerbe to see the beam spread by 1.0 cm because of the uncertaintyprinciple? Compare this answer with the diameter of the universe (? 1026 m).

We have discussed two wavelengths associated withthe electron, the Compton wavelength and the deBroglie wavelength. Which is an actual physical
wavelength associated with the electron?
 
A) the de Broglie wavelength
B) the Compton wavelength
C) both wavelengths
D) neither wavelength
Image of page 1
 

A proton has a speed of 2.3 × 104 m/s. The energy of a photon thathas the same de Broglie wavelength as the proton is closestto:

A) 120 keV B) 72 keV C) 140 keV D) 49 keV E) 95 keV

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