Home
Class 12
PHYSICS
Monochromatic radiation of wavelength la...

Monochromatic radiation of wavelength `lambda` are incident on a hydrogen sample in ground state. Hydrogen atoms absorb the light and subsequently emit radiations of 10 different wavelength . The value of `lambda` is nearly :

A

`95 nm`

B

`103 nm`

C

`273 nm`

D

`88 nm`

Text Solution

Verified by Experts

The correct Answer is:
A
No of spectral lines
`(n(n-1))/(2) =10implies n^(2)-n-20=0 implies n=5, n= -4`
`Delta=13.6 [1-1/25]=13.056, lambda=(hc)/(Delta E)=95 nm`
Promotional Banner

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise - 47|1 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise - 48|1 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise - 45|1 Videos

  • RACE

    ALLEN |Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|25 Videos

  • TEST PAPER

    ALLEN |Exercise PHYSICS|4 Videos

Similar Questions

Explore conceptually related problems

In a hydrogen atom, the electron is in n^(th) excited state. It may come down to second excited state by emitting ten different wavelengths. What is the value of n ?

The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy levels to emit radiation of 6 wavelengths. During which of the following transitions will the maximum wavelength radiation be emitted ?

Radiation of wavelength lambda is incident on a photocell.The fastest emitted electron has speed v.If wavelength is changed to (3lambda)/(4) the speed of the fastest emitted electron will be

When a metallic surface is illuminated with radiation of wavelength lambda ,the stopping potential is V.If the same surface is illuminated with radiation of wavelength 2 lambda ,the metallic surface is

If radiation of all wavelengths from ultraviolet to infrared ispassed through hydrogen gas at room temperature absorption lines will be observed in the

A light beam of wavelength lambda incident on a silver sphere of radius r. suspended by a nonconducting thread. Find potential aquired by sphere

A photon of energy 12.09 eV is completely absorbed by a hydrogen atom initially in the ground state. The quantum number of excited state is

In electron ….. From infinite state to ground state in H atom . Find the emitted wavelength .

In Young's double-slit experiment using monochromatic light of wavelength lambda , the intensity of light at a point on the screen where path difference is lambda , is K units. What is the intensity of light at a point where path difference is lambda//3 ?

Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength lamda , then what is the quantum number of excited states ?