Class 12PhysicsDual Nature of Radiation and MatterDavisson-Germer Experiment and Heisenberg Uncertainty Principle
Medium$A$ parallel beam of electrons travelling in $x-$ direction falls on a slit of width $d$. If after passing the slit,an electron acquires momentum $P_y$ in the $y-$ direction,then for a majority of electrons passing through the slit ($h$ is Planck's constant):
- A$|P_y|d > h$
- B$|P_y|d < h$
- C$|P_y|d \simeq h$
- D$|P_y|d >> h$
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Similar Questions
In the Davisson-Germer experiment,an electron beam with a wavelength of $1.5 \ \mathring{A}$ is incident normally on a crystal with an atomic spacing of $3 \ \mathring{A}$. At what angle (in degrees) will the first maximum be formed?
Medium
View SolutionIn the Davisson and Germer experiment,the velocity of electrons emitted from the electron gun can be increased by
Match List $-I$ (Experiment performed) with List $-II$ (Phenomena discovered/associated) and select the correct option from the options given below:
List $-I$ List $-II$ $(1)$ Davisson and Germer $(i)$ Wave nature of electrons $(2)$ Millikan's oil drop experiment $(ii)$ Charge of an electron $(3)$ Rutherford experiment $(iii)$ Quantisation of energy levels $(4)$ Franck-Hertz experiment $(iv)$ Existence of nucleus
| List $-I$ | List $-II$ |
| $(1)$ Davisson and Germer | $(i)$ Wave nature of electrons |
| $(2)$ Millikan's oil drop experiment | $(ii)$ Charge of an electron |
| $(3)$ Rutherford experiment | $(iii)$ Quantisation of energy levels |
| $(4)$ Franck-Hertz experiment | $(iv)$ Existence of nucleus |
Who was the first to verify that electrons are wave-like in nature?
Easy
View Solution$A$ sodium atom is in one of the states labeled 'Lowest excited levels'. It remains in that state for an average time of $10^{-8} \, s$,before it makes a transition back to a ground state. What is the uncertainty in energy of that excited state?
Medium
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