COMEDK · Physics · 28. Atomic Physics
The shortest wavelengths of Paschen, Lymen and Balmer series are in the ratio
- A \(2:1:3\)
- B \(3: 1: 2\)
- C \(4: 1: 9\)
- D \(9: 1: 4\)
Answer & Solution
Correct Answer
(D) \(9: 1: 4\)
Step-by-step Solution
Detailed explanation
The wavelength \(\lambda\) for a transition in a hydrogen-like atom is given by the Rydberg formula: \(\dfrac{1}{\lambda} = R Z^2 \left( \dfrac{1}{n_1^2} - \dfrac{1}{n_2^2} \right)\). For the shortest wavelength of any series, the transition occurs from \(n_2 = \infty\) to…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A block slides on rough horizontal surface with a velocity of \(20 \mathrm{~m} / \mathrm{s}\). It comes to rest after travelling a distance of 80 m . The coefficient of kinetic friction between block and surface is (Take, \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right)\)COMEDK 2024 Hard
- To the potentiometer wire of length \(L\) and \(10 \Omega\) resistance, a battery of emf \(2.5 \mathrm{~V}\) and a resistance \(R\) are connected in series. If a potential difference of \(1 \mathrm{~V}\) is balanced across \(L\) / 2 length, the value of \(R\) in \(\Omega\) will beCOMEDK 2020 Medium
- Two co-axial lenses of power \(+4 \mathrm{D}\) and \(-2 \mathrm{D}\) are placed in contact. The focal length of combination isCOMEDK 2016 Medium
- Three point charges are located on a circular arc at A, B and C as shown in the figure below. The total electric field at the centre of the arc (0) is
COMEDK 2024 Medium - If pressure of an ideal gas is increased by keeping temperature constant the kinetic energy willCOMEDK 2024 Easy
- Rain is falling vertically downwards at a velocity \(9 \mathrm{~ms}^{-1}\). And wind starts blowing at a speed of \(4 \mathrm{~ms}^{-1}\) in the west to east direction. In which direction should the girl hold her umbrella to protect herself from the rain?COMEDK 2025 Medium
More PYQs from COMEDK
- Which of the following amines cannot be prepared by Gabriel's phthalimide synthesis?COMEDK 2025 Medium
- Find \({ }^n C_{21}\), if \({ }^n C_{10}={ }^n C_{12}\)COMEDK 2023 Easy
- \(\int \dfrac{(x-1)}{(x+1)^3} e^x d x=P(x)+c\) then \(P(x)=\)COMEDK 2025 Medium
- Given \(Z=80 x+120 y\), subject to constraints are \(x+3 y \leq 30 ; 3 x+4 y \leq 60 ; x \geq 0 ; y \geq 0\).
P is one of the corner points of the feasible region for the given Linear Programming Problem.
Then the coordinate of P isCOMEDK 2025 Medium - Blowing air with open mouth is an example ofCOMEDK 2013 Easy
- If \(A=\left[\begin{array}{cc}1 & \log _{b} a \\ \log _{a} b & 1\end{array}\right]\), then \(|A|\) is equal toCOMEDK 2012 Easy