Easy
Match the following table.
$List-I$ $List-II$ $A$. Michelson-Morley experiment $I$. The existence of anti-matter $B$. Stern-Gerlach experiment $II$. The existence of de-Broglie matter waves $C$. Davisson-Germer experiment $III$. Electrons have spins $D$. Anderson discovery of positron $IV$. The non-existence of ether
| $List-I$ | $List-II$ |
| $A$. Michelson-Morley experiment | $I$. The existence of anti-matter |
| $B$. Stern-Gerlach experiment | $II$. The existence of de-Broglie matter waves |
| $C$. Davisson-Germer experiment | $III$. Electrons have spins |
| $D$. Anderson discovery of positron | $IV$. The non-existence of ether |
- A$A-I, B-II, C-III, D-IV$
- B$A-II, B-III, C-IV, D-I$
- C$A-IV, B-III, C-II, D-I$
- D$A-IV, B-III, C-I, D-II$
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Similar Questions
The radiation corresponding to $3 \rightarrow 2$ transition of a hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of $3 \times 10^{-4} \ T$. If the radius of the largest circular path followed by these electrons is $10.0 \ mm$,the work function of the metal is close to......$ eV$.
DifficultJEE MAIN 2014
View SolutionSome laws/processes are given in Column $I$. Match these with the physical phenomena given in Column $II$.
Column $I$ Column $II$ $(A)$ Transition between two atomic energy levels $(p)$ Characteristic $X$-rays $(B)$ Electron emission from a material $(q)$ Photoelectric effect $(C)$ Mosley's law $(r)$ Hydrogen spectrum $(D)$ Change of photon energy into kinetic energy of electrons $(s)$ $\beta$-decay
| Column $I$ | Column $II$ |
| $(A)$ Transition between two atomic energy levels | $(p)$ Characteristic $X$-rays |
| $(B)$ Electron emission from a material | $(q)$ Photoelectric effect |
| $(C)$ Mosley's law | $(r)$ Hydrogen spectrum |
| $(D)$ Change of photon energy into kinetic energy of electrons | $(s)$ $\beta$-decay |
In a photoelectric effect experiment,three different metal plates $p, q,$ and $r$ have work functions $\phi_p = 2.0 \ eV, \phi_q = 2.5 \ eV,$ and $\phi_r = 3.0 \ eV$. The incident light beams have wavelengths $\lambda_p = 550 \ nm, \lambda_q = 450 \ nm,$ and $\lambda_r = 350 \ nm$. The intensity of light is the same for each plate. The correct $I-V$ graph for the experiment is: $[hc = 1240 \ eV \ nm]$
Medium
View SolutionAssertion $(A)$: Photoelectric effect demonstrates the wave nature of light.
Reason $(R)$: The number of photoelectrons is directly proportional to the frequency of light.
Reason $(R)$: The number of photoelectrons is directly proportional to the frequency of light.
Medium
View SolutionGive a powerful way to determine an upper limit to the size of the electron.
Easy
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