Yellow light emitted from a sodium light has a wavelength λ of 580 nm . Calculate the frequency ν and wavenumber ϑ - of the yellow light.

c = Velocity of light in vacuum = 3 × 10 8 m / s The wavelength of yellow light ( λ ) = 580 nm = 580 × 10 - 9 m wavelength ( λ ) = velocity of light ( c ) frequency ϑ ϑ = c λ ………. 1 Substituting the values in expression (1) : ϑ = 3 × 10 8 580 × 10 - 9 = 5 .17 × 10 14 s - 1 Thus, the frequency of yellow light emitted from the sodium lamp = 5 .17 × 10 14 s - 1 The wave number of yellow light ϑ - = 1 wavelength ( λ ) = 1 580 × 10 - 9 = 1 .72 × 10 6 m - 1

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Wavenumber for a radiation having 5800 Å
wavelength is x × 10 cm^–1 . The value of x is

_____.

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The value of Planck's constant is

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Electromagnetic radiation of wavelength

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is ___. (Rounded-off to the nearest integer)

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The frequency of a wave is

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The wavelength of light having frequency

60 M H z

is-

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

Yellow light emitted from a sodium light has a wavelength

(λ)

580 nm

. Calculate the frequency

(ν)

and wavenumber

(\bar{ϑ})

of the yellow light.

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

Calculate the wavelength and energy of radiation emitted for the electronic transition from infinity to stationary state for one

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-atom. Given

E_{1} = - 13.6 e V

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The frequency of yellow light having wavelength

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is-

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The wavenumber of a spectral line is

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. The energy corresponding to this line is:

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

Neon gas is generally used in the sign boards. If it emits strongly at

616 nm,

calculate (a) the frequency of emission, (b) distance traveled by this radiation in

30 s

2 J

of energy.

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The radiation with maximum frequency is

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The frequency of radiation emitted when the electron falls from

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n = 1

in a hydrogen atom will be (Given ionization energy of

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)

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

Calculate the wavelength, frequency and wave number of a light wave whose time period is

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The frequency of a wave is

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

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In germanium the energy gap is about 0.75 eV. The wavelength of light which germanium starts absorbing is

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Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

Choose the correct sequence of the radiation sources in increasing order of the wavelength of electromagnetic waves produced by them.

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Nature of Electromagnetic Radiation

The wavelength of light having frequency

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Arrange the following type of radiations in increasing order of frequency: (a) radiation from microwave oven (b) amber light from traffic signal (c) radiation from FM radio (d) cosmic rays from outer space and (e) X-rays.

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Cotyledons are also called-

Wavenumber for a radiation having 5800 Å wavelength is x × 10 cm–1 . The value of x is _____.

Important Questions on Atomic Structure

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Wavenumber for a radiation having 5800 Å
wavelength is x × 10 cm^–1 . The value of x is

_____.