AP EAMCET · PHYSICS · Atomic Physics
If \(\lambda_1\) and \(\lambda_2\) are the wavelength of the photons emitted, when electrons in the \(n^{\text {th }}\) orbit of hydrogen atom fall to first excited state and ground state respectively, then the value of n is
- A \(\sqrt{\frac{2\left(\lambda_2-\lambda_1\right)}{2 \lambda_2-\lambda_1}}\)
- B \(\sqrt{\frac{2 \lambda_2-\lambda_1}{2\left(\lambda_2-\lambda_1\right)}}\)
- C \(\sqrt{\frac{4 \lambda_2-\lambda_1}{4\left(\lambda_2-\lambda_1\right)}}\)
- D \(\sqrt{\frac{4\left(\lambda_2-\lambda_1\right)}{\left(4 \lambda_2-\lambda_1\right)}}\)
Answer & Solution
Correct Answer
(D) \(\sqrt{\frac{4\left(\lambda_2-\lambda_1\right)}{\left(4 \lambda_2-\lambda_1\right)}}\)
Step-by-step Solution
Detailed explanation
We have, \(\lambda_1=\frac{h c}{\Delta E_{n \rightarrow 2}} \text { and } \lambda_2=\frac{h c}{\Delta E_{n \rightarrow 1}}\)…
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
- The displacement of a particle starting from rest at is given by . The time in seconds at which the particle will attain zero velocity isAP EAMCET 2021 Easy
- An electromagnetic wave of wavelength \(2 \times 10^{-10} \mathrm{~m}\) passes from vacuum into a dielectric medium of relative permitivity 4 . Then its wavelength will beAP EAMCET 2018 Easy
- Match the following:
Column Column (a) Transverse wave through a steel rod (i) (b) Longitudinal waves in earth's crust (ii) (c) Longitudinal waves through a steel rod (iii) (d) Ripples (iv) AP EAMCET 2021 Hard - The magnitude of the axial field due to a short bar magnet at a distance of \(50 \mathrm{~cm}\) from its mid-point is (The magnetic moment of the bar magnet is \(0.4 \mathrm{Am}^2\) )AP EAMCET 2023 Easy
- A uniform wire of length \(200 \mathrm{~cm}\) is connected to a battery, two resistors and a galvanometer as shown in the figure. The galvanometer shows null deflection when the jockey \(\mathrm{J}\) is at 80 \(\mathrm{cm}\) from point \(A\). If the resistor \(R_2\) is shunted with \(30 \Omega\) resistance, the galvanometer shows null deflection when the jockey \(J\) is at \(100 \mathrm{~cm}\) from point \(B\). Then the values of \(R_1\) and \(R_2\) respectively are
AP EAMCET 2018 Hard - If the least distance of distinct vision for a boy is 35 cm, then the lens to be used by the boy for correcting the defect of his eye isAP EAMCET 2025 Medium
More PYQs from AP EAMCET
- A particle is moving along a horizontal circle of radius ' \(r\) ' under a centripetal force \(\frac{-c}{r^2}\) where ' \(c\) ' is a constant. Then, the total energy of the particle isAP EAMCET 2017 Easy
- Let \(f(x)=x^2+\frac{1}{x^2}\) and \(g(x)=x-\frac{1}{x}\) for \(x \in R-\{-1,0,+1\}\), then the local minimum of \(\frac{f(x)}{g(x)}\) isAP EAMCET 2022 Medium
- The minimum value of \(|z-1|+|z-5|\) isAP EAMCET 2025 Medium
- A message signal of frequency \(8 \mathrm{kHz}\) and peak voltage \(12 \mathrm{~V}\) is used to modulate a carrier of frequency 1.2 MHz and peak voltage \(20 \mathrm{~V}\). The modulation index isAP EAMCET 2022 Medium
- Conjugate acid and conjugate base of \(\mathrm{HCO}_3^{-}\)are respectivelyAP EAMCET 2023 Easy
- If \(\log _{\frac{1}{\sqrt{3}}}\left\{\frac{|z|^2-|z|+1}{2+|z|}\right\}>-2\), then \(\mathrm{z}\) lies insideAP EAMCET 2017 Medium