Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Atoms and Nuclei question

2005 · Q145
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Atoms and Nuclei
  5. /2005 · Q145

Atoms and Nuclei question

2005 · Q145

NEETPhysicsAtoms and NucleiMCQ+4 / −1
Energy levels A, B and C of a certain atom corresponding to increasing values of energy i.e. EA < EB < EC. If λ\lambdaλ1, λ\lambdaλ2 and λ\lambdaλ3 are wavelengths of radioations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct?
  1. A
    λ3=λ1+λ2{\lambda _3} = {\lambda _1} + {\lambda _2}λ3​=λ1​+λ2​
  2. B
    λ3=λ1λ2λ1+λ2{\lambda _3} = {{{\lambda _1}{\lambda _2}} \over {{\lambda _1} + {\lambda _2}}}λ3​=λ1​+λ2​λ1​λ2​​
  3. C
    λ1+λ2+λ3=0{\lambda _1} + {\lambda _2} + {\lambda _3} = 0λ1​+λ2​+λ3​=0
  4. D
    λ32=λ12+λ22{\lambda _3}^2 = {\lambda _1}^2 + {\lambda _2}^2λ3​2=λ1​2+λ2​2
View written solutionFree

Correct answer: B

AIPMT 2005 Physics - Atoms and Nuclei Question 62 English Explanation


$ \therefore $ (EC – EB) + (EB – EA) = (EC – EA)

$ \Rightarrow $ $${{hc} \over {{\lambda _3}}} = {{hc} \over {{\lambda _1}}} + {{hc} \over {{\lambda _2}}}$$

$ \Rightarrow $ $${\lambda _3} = {{{\lambda _1}{\lambda _2}} \over {{\lambda _1} + {\lambda _2}}}$$
PreviousNext

More from Atoms and Nuclei

  • If M(A; Z), Mp and Mn denote the masses of the nucleus ZA​X, proton and neutron respectively in units of u (1 u = 931.5 MeV/c2) and BE represents its bonding energy in MeV, then2004 · MCQ
  • The Bohr model of atoms2004 · MCQ
  • If in a nuclear fusion process the masses of the fusing nuclei be m1 and m2 and the mass of the resultant nucleus be m3, then2004 · MCQ
  • An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force F between the two is2003 · MCQ
  • Solar energy is mainly caused due to2003 · MCQ
  • The volume occupied by an atom is greater than the volume of the nucleus by a factor of about2003 · MCQ
  • The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of 24​ He is (Given helium nucleus mass ≈ 4.0015 u.)2003 · MCQ
  • In which of the following systems will the radius of the first orbit (n = 1) be minimum ?2003 · MCQ