The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is $.... \times 10^{-19} \, J$
[Given: The threshold frequency of platinum is $1.3 \times 10^{15} \, s^{-1}$ and $h = 6.6 \times 10^{-34} \, J \, s$.]
[Given: The threshold frequency of platinum is $1.3 \times 10^{15} \, s^{-1}$ and $h = 6.6 \times 10^{-34} \, J \, s$.]
- A$32.1$
- B$0.624$
- C$8.58$
- D$976$
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Similar Questions
Values of work function $(W_0)$ for a few metals are given below:
Metal $Li$ $Na$ $K$ $Mg$ $Cu$ $Ag$ $W_0 / eV$ $2.42$ $2.3$ $2.25$ $3.7$ $4.8$ $4.3$
The number of metals which will show photoelectric effect when light of wavelength $400 \ nm$ falls on it is $........$.
Given: $h = 6.6 \times 10^{-34} \ J \ s$,$c = 3 \times 10^8 \ m \ s^{-1}$,$e = 1.6 \times 10^{-19} \ C$
| Metal | $Li$ | $Na$ | $K$ | $Mg$ | $Cu$ | $Ag$ |
| $W_0 / eV$ | $2.42$ | $2.3$ | $2.25$ | $3.7$ | $4.8$ | $4.3$ |
The number of metals which will show photoelectric effect when light of wavelength $400 \ nm$ falls on it is $........$.
Given: $h = 6.6 \times 10^{-34} \ J \ s$,$c = 3 \times 10^8 \ m \ s^{-1}$,$e = 1.6 \times 10^{-19} \ C$
The radius of the first orbit of $Li^{2+}$ is $X \mathring{A}$. The radius of the third orbit of $He^{+}$ (in $\mathring{A}$) is (in $X$)
If the Thomson model of the atom was correct,then the result of Rutherford's gold foil experiment would have been:
If the shortest wavelength of the hydrogen atom in the Lyman series is $x$, then the longest wavelength in the Balmer series of $He^+$ is:
DifficultJEE MAIN 2026
View SolutionThe ratio of velocity of electron in the second orbit of $He^{+}$ to the third orbit of $B^{4+}$ is $:-$
Medium
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