MHT CET · Physics · Atomic Physics
The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) third to \(2^{\text {nd }}\) energy level and (ii) highest energy level to \(3^{\text {rd }}\) level is
- A 3:2
- B 5:4
- C 5:3
- D 8:3
Answer & Solution
Correct Answer
(B) 5:4
Step-by-step Solution
Detailed explanation
\(E_1 = k \left( \frac{1}{2^2} - \frac{1}{3^2} \right) = k \left( \frac{1}{4} - \frac{1}{9} \right) = k \left( \frac{5}{36} \right)\) \(E_2 = k \left( \frac{1}{3^2} - \frac{1}{\infty^2} \right) = k \left( \frac{1}{9} \right)\)
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 alternating voltage is given by \(\mathrm{v}=\mathrm{v}_0 \sin \left(\omega \mathrm{t}+\frac{\pi}{3}\right)\) when will be the voltage maximum for first time?MHT CET 2024 Hard
- Light of two different frequencies whose photons have energies \(1.3 \mathrm{eV}\) and \(2.8 \mathrm{eV}\) respectively, successfully illuminate a metallic surface whose work function is \(0.8 \mathrm{eV}\). The ratio of maximum speeds of emitted electrons will beMHT CET 2022 Easy
- What is the output Y in the following circuit, when all the three inputs A, B, C are first 'zero' and then 'one'?
MHT CET 2024 Easy - In a study of transistor as an amplifier, the ratio of collector current to emitter current is \(0.98 .\) The collector current is \(3 \mathrm{~mA}\), then base current will be approximatelyMHT CET 2020 Easy
- A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two end conduct an amount of heat ' \(Q_1\) ' in time ' \(t\) ' the metallic rod is melted and the material is formed into a rod of length four times the length of original rod. The amount of heat conducted by the new rod when placed in thermal contact with the same two reservoirs in time \(t\) is ' \(Q_2\) '. Then \(\frac{Q_1}{Q_2}\) isMHT CET 2022 Medium
- A sonometer wire resonates with a given tuning fork forming standing wave with 5 antinodes between two bridges when mass of \(9 \mathrm{~kg}\) is suspended from the wire. When mass 'm' is suspended from the wire, with same fork and same length between two bridges 3 antinodes are formed. Mass \(\mathrm{M}\) isMHT CET 2020 Medium
More PYQs from MHT CET
- In a radioactive material the activity at time \(t_{1}\) is \(R_{1}\) and at a later time \(t_{2}\), it is \(R_{2}\). If the decay constant of the material is \(\lambda\), thenMHT CET 2007 Medium
- A tuning fork of frequency \(220 \mathrm{~Hz}\) produces sound waves of wavelength \(1.5 \mathrm{~m}\) in air at N.T.P. The increase in wavelength when the temperature of air is \(27^{\circ} \mathrm{C}\) is nearly \(\left(\sqrt{\frac{300}{273}}=1.05\right)\)MHT CET 2023 Medium
- The de-Broglie wavelength of an electron in the ground state of the hydrogen atom isMHT CET 2010 Easy
- According to Raoult's law, relative lowering of vapour pressure for a solution containing a non volatile solute is eal toMHT CET 2020 Easy
- If \(\mathrm{I}=\int \frac{\mathrm{e}^x}{\mathrm{e}^{4 x}+\mathrm{e}^{2 x}+1} \mathrm{~d} x\) and \(\mathrm{J}=\int \frac{\mathrm{e}^{-x}}{\mathrm{e}^{-4 x}+\mathrm{e}^{-2 x}+1} \mathrm{~d} x\) then for any arbitrary constant c, the value of \(\mathrm{J}-\mathrm{I}\) equalsMHT CET 2023 Medium
- Two different radioactive elements with half-lives ' \(\mathrm{T}_{1}\) ' and ' \(\mathrm{T}_{2}\) ' have undecayed
atoms ' \(\mathrm{N}_{1}{ }^{\prime}\) and \({ }^{\prime} \mathrm{N}_{2}{ }^{\prime}\) respectively, present at a given instant. The ratio of their
activities at this instant isMHT CET 2020 Easy