MEDIUM
12th ICSE
IMPORTANT
Earn 100

On an energy level diagram of hydrogen atom; show by a downward or an upward arrows a transition responsible for absorption lines of Lyman series.

Important Questions on Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 13
Is it essential that all the lines available in emission spectrum should be available in absorption spectrum also? Give reason.
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 14
How can the elements be identified by the study of line spectrum?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 16
An α-particle passing through a potential difference of V volt strikes a nucleus. Prove that if the atomic number be Z, then the distance of the closest approach of the particle to the nucleus will be 14.4 ZVAo.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 17
Why is motion of planets around the sun not governed by Bohr's postulate of quantisation of angular momentum mvr=nh2 π?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 18
Using Bohr's formula for energy quantisation, find the excitation energy of n=3 level of He+ ion.
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 18
Using Bohr's formula for energy quantisation, find the ionisation potential of the ground state of Li++ ion.
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 19
Hydrogen atom has only one electron but its emission spectrum has many lines. Explain with reason.
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 20
How are various lines of Lyman series formed? Explain on the basis of Bohr's theory.