Atomic Spectra

IMPORTANT

Atomic Spectra: Overview

This topic covers concepts, such as, Hydrogen Emission Spectrum, Explanation of Line Spectrum of Hydrogen, Line Atomic Spectrum & Spectrum etc.

Important Questions on Atomic Spectra

MEDIUM
IMPORTANT

The frequency of oscillation of the electric field vector of a certain electromagnetic.wave is  5×1014 Hz. What is the frequency of oscillation of the corresponding magnetic field vector and to which part of the electromagnetic spectrum does it belong?

EASY
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The spectrum of He is expected to be similar to that

EASY
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In the Balmer series of atomic spectra of hydrogen, there is spectral line having wavelength 434.4 nm. Calculate the number of higher orbit from which the electron drops to generate this line. R=10.97×106 m-1

MEDIUM
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What are some natural sources of continuous spectra?

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What causes continuous spectra?

EASY
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The series of lines present in the visible region of the hydrogen spectrum is

EASY
IMPORTANT

In the Balmer series of atomic spectra of hydrogen, there is spectral line having wavelength 434.4 nm. Calculate the number of higher orbit from which the electron drops to generate this line. R=10.97×106 m-1

HARD
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What transition in the He+ spectrum would have the same wavelength as the first Lyman transition of hydrogen (n2=2 to n1=1)?

EASY
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When electrons from higher orbits of hydrogen atom jump to the L-shell, to which series of the hydrogen spectrum will the emitted light belong?(Lyman/Balmer)

HARD
IMPORTANT

When the electron of a hydrogen atom jumps from n=4 to n=1 state, the number of spectral lines emitted is 6.

EASY
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The series of lines present in the visible region of the hydrogen spectrum is _____ (Lyman/Balmer).

MEDIUM
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Energy levels of A, B, C of a certain atom correspond to the increasing value of energy, i.e. EA<EB<Ec. If  λ1, λ2 and λ3 are the wavelengths of radiations corresponding to the transitions C  to B, B  to A  and C  to A  respectively, which of the following is correct?

EASY
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The range of wavelengths covering red colour to violet colour is called the _____ spectrum.

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Emergency signals and danger signals are red because red light has high frequency than other colours.

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If a player is wearing a uniform consisting of a red shirt and a white short as seen in a white light. So, their true colours are red and white respectively.

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An object seen as red will reflect red colour and will absorb all other colours while the object seen as white will reflect all the colours and will not absorb any colour.

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The extreme colours in the pure spectrum are blue and red.

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X-rays help us to study the structure of crystals.

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Choose the correct order of wavelength for below mentioned four regions of electromagnetic spectrum:

(Infrared rays, Radio waves, Microwaves, Ultraviolet rays)

MEDIUM
IMPORTANT

The wavelength of red colour is 7 × 10-7 m and that of blue is 4×10-7 m. If vR and vB be the speed of red and blue colours respectively in glass. Then which of the following is correct?