When electron absorbs energy from surroundings and moves to excited state the spectrum formed is ……………..
A) Emission spectrum
B) Absorption spectrum
C) Fine spectrum
D) Continuous spectrum
1 Answers
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The spectral line in the spectrum of light from a star is found to be shifted by 0.032% from its normal position towards the red end of the spectrum .
Correct Answer - `96 km s^(-1)`
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The energy of K-electron in tungsten is -20.0 keV and of an L-electron is -2.0 ke V. Find the wavelength of X-rays emitted when an electron jumps from
Correct Answer - 0.6875 Å
2 Answers 1 views
A photon of energy 12.09 eV is absorbed by an electron in ground state of a hydrogen atoms. What will be the energy level of electron ? The energy of
Correct Answer - n=3
2 Answers 3 views
A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` Assuming that the entire photon energy is taken up by
Correct Answer - `[11.2eV]`
2 Answers 1 views
An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the
Correct Answer - `n=3;` 1025 Å, 6563 Å; 1215 Å
2 Answers 1 views
What is meant by broad spectrum antibiotic and narrow spectrum antibiotics?
Antibiotics which are effective against wide range of bacteria are known as broad spectrum antibiotics, while antibiotics which are effective against one group of bacteria are known as narrow spectrum...
2 Answers 1 views
The spectrum formed due to excited electron come back to ground state is ………………….
Correct option is B) only ii
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Write a short note on emission spectrum of hydrogen. Also, list all the five series of lines in the hydrogen spectrum.
i. When electric discharge is passed through gaseous hydrogen, it emits radiation. The recorded spectrum of this emitted radiation is called hydrogen emission spectrum. ii. This spectrum falls in different regions of...
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In hydrogen spectrum, the series of lines appearing in ultraviolet region of electromagnetic spectrum are called ………….
Correct Option Is : (A) Lyman series Lyman Series - U.V region Balmer Series - Visible Region Pfund and Brackett Series - IR regions
2 Answers 1 views