## Question

### Solution

Correct option is Here maximum âˆ†v = 550,00001 – 551,00000 = 1 ms–1.    #### SIMILAR QUESTIONS

Q1

An electron in a hydrogen atom in the ground state absorbs energy equal to 1.5 time the minimum energy required to remove the electron from the hydrogen atom. Calculate the wavelength of the electron emitted.

Q2

Find out the number of waves made by a Bohr electron in its 3rd orbit.

Q3

When a certain metal was irradiated with a light of frequency

3.2 × 1016 Hz, the photoelectrons had twice the kinetic energy as emitted when the same metal was irradiated with light of frequency 2.0 × 1016 Hz. Calculate the threshold frequency (v0) of the metal.

Q4

The wavelength of line of Balmer series is 6500 Å. What is the wavelength of line of Balmer series?

Q5

The atomic spectrum of hydrogen is found to contain a series of lines at wavelengths 656.46, 486.27, 434.17 and 410.29 nm. What will be the wavelength of the next line in the series?

Q6

Calculate the energy required for the process The ionization energy for the H-atom in the ground state is

2.18 × 10–18 J atom–1.

Q7

A photon of wavelength 1.4 Å collides with an electron. After collision, the wavelength of the photon is found to be 2.0 Å. Calculate the energy of the scattered electron.

Q8

If the binding energy of electrons in a metal is 250 kJ mol–1, what should be threshold frequency of the striking photons?

Q9

When would de Broglie wavelength of a moving electron become equal to that of a moving proton? Mass of electron =

9.1095 × 10–31 kg and mass of proton = 1.6725 × 10–27 kg.

Q10

How fast is an electron moving if it has a wavelength equal to the distance it travels in one second?

(mass of electron = 9.1 × 10–31 kg)