(D) Calculation of frequency:$\lambda = 4000 \ \mathring{A} = 4000 \times 10^{-10} \ m = 4 \times 10^{-7} \ m$Since $\nu = \frac{c}{\lambda}$$\nu = \f

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$7.5 \times 10^{14} \ s^{-1}, 4.96 \times 10^{-19} \ J$

(D) Calculation of frequency:$\lambda = 4000 \ \mathring{A} = 4000 \times 10^{-10} \ m = 4 \times 10^{-7} \ m$Since $\nu = \frac{c}{\lambda}$$\nu = \frac{3 \times 10^8 \ m/s}{4 \times 10^{-7} \ m} = 0.75 \times 10^{15} \ s^{-1} = 7.5 \times 10^{14} \ s^{-1}$Calculation of energy:$E = h\nu = 6.626 \times 10^{-34} \ J \cdot s \times 7.5 \times 10^{14} \ s^{-1} = 4.96 \times 10^{-19} \ J$

Class 11 Chemistry Structure of Atom Atomic models and Planck's quantum theory

Medium

The frequency and energy of a photon with a wavelength of $4000 \ \mathring{A}$ are respectively.......

A
$3.65 \times 10^{14} \ s^{-1}, 8.22 \times 10^{-10} \ J$
B
$8.22 \times 10^{-10} \ s^{-1}, 3.38 \times 10^{-10} \ J$
C
$3.38 \times 10^{-10} \ s^{-1}, 5.26 \times 10^{13} \ J$
D
$7.5 \times 10^{14} \ s^{-1}, 4.96 \times 10^{-19} \ J$

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Class 11

Chemistry Questions

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Structure of Atom

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Atomic models and Planck's quantum theory

In the Bohr model of an atom, the radius of a hydrogen atom in the ground state is $r_1$ and the radius of a $He^{+}$ ion in the ground state is $r_2$. Which of the following is correct?

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Which of the following energy changes is less than the third Balmer transition in the $He^{\oplus}$ ion?

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If the $I.E.$ of $He^{+}$ is $54.4 \ eV$,then -

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If $P.E.$ of $3^{rd}$ shell is $-20 \ eV/atom$,then find the $I.P.$ of the $3^{rd}$ shell of that element.

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Find the value of wave number $(\bar{v})$ in terms of Rydberg's constant,when the transition of an electron takes place between two levels of $He^{+}$ ion whose sum is $4$ and difference is $2$.

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The frequency and energy of a photon with a wavelength of $4000 \ \mathring{A}$ are respectively.......

Similar Questions

In the Bohr model of an atom, the radius of a hydrogen atom in the ground state is $r_1$ and the radius of a $He^{+}$ ion in the ground state is $r_2$. Which of the following is correct?

Which of the following energy changes is less than the third Balmer transition in the $He^{\oplus}$ ion?

If the $I.E.$ of $He^{+}$ is $54.4 \ eV$,then -

If $P.E.$ of $3^{rd}$ shell is $-20 \ eV/atom$,then find the $I.P.$ of the $3^{rd}$ shell of that element.

Find the value of wave number $(\bar{v})$ in terms of Rydberg's constant,when the transition of an electron takes place between two levels of $He^{+}$ ion whose sum is $4$ and difference is $2$.

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