JEE Mains · Physics · STD 12 - 12. atoms
The energy levels of an hydrogen atom are shown below. The transition corresponding to emission of shortest wavelength is
- A \(C\)
- B \(D\)
- C \(B\)
- D \(A\)
Answer & Solution
Correct Answer
(B) \(D\)
Step-by-step Solution
Detailed explanation
\(\Delta E =\frac{ hc }{\lambda} \Rightarrow \lambda \alpha \frac{1}{\Delta E }\) For shortest wavelength, energy gap should be maximum. So, correct choice is transition from \(n =3\) to \(n =1\).
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
- An electron rotates in a circle around a nucleus having positive charge \(\mathrm{Ze}\). Correct relation between total energy ( \(E\) ) of electron to its potential energy \((U)\) is _______.JEE Mains 2024 Hard
- In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown in the figure, it is a straight line. One may conclude that:
JEE Mains 2019 Hard - The equation of motion of a particle is given by \(x = a \sin\left(50t + \dfrac{\pi}{3}\right)\) cm. The particle will come to rest at time \(t_1\) and it will have zero acceleration at time \(t_2\). The \(t_1\) and \(t_2\) respectively are _______.JEE Mains 2026 Medium
- Two identical bodies, projected with the same speed at two different angles cover the same horizontal range \(R\). If the time of flight of these bodies are \(5\) s and \(10\) s, respectively, then the value of \(R\) is ________ m. (Take \(g=10\) m/s\(^2\))JEE Mains 2026 Medium
- The heat extracted out of \(x\) gram of water initially at \(50°C\) to cool it down to \(0°C\) is sufficient to evaporate \((1000 - x)\) gram of water also initially at \(50°C\). The value of \(x\) (closest integer) is _______.
(Take latent heat of water \(2256\text{ kJ/kg.K}\), specific heat capacity of water \(4200\text{ J/kg.K}\))JEE Mains 2026 Hard - Two light beams of intensities in the ratio of \(9: 4\) are allowed to interfere. The ratio of the intensity of maxima and minima will beJEE Mains 2022 Medium
More PYQs from JEE Mains
- If \(\int {{e^{\sec \,x}}\,\left( {\sec \,x + \tan \,x\,f\left( x \right) + \left( {\sec \,x\,\tan \,x + {{\sec }^2}\,x} \right)} \right)dx = {e^{\sec \,x\,}}\,f\left( x \right)} + C\) , then a possible choice of \(f\left( x \right)\) isJEE Mains 2019 Hard
- In the given figure the blocks \(A , B\) and C weigh \(4 kg, 6 kg\) and 8 kg respectively. The co-efficient of sliding friction between any two surfaces is 0.5 . The force \(\overrightarrow{ F }\) required to slide the block C with constant speed is _________ N . (Used \(g =10 m / s ^2\) )
JEE Mains 2026 Medium - If \(\frac{1}{\sqrt{1}+\sqrt{2}}+\frac{1}{\sqrt{2}+\sqrt{3}}+\ldots+\frac{1}{\sqrt{99}+\sqrt{100}}=m\) and \(\frac{1}{1 \cdot 2}+\frac{1}{2 \cdot 3}+\ldots+\frac{1}{99 \cdot 100}=\mathrm{n}\), then the point \((\mathrm{m}, \mathrm{n})\) lies on the lineJEE Mains 2024 Hard
- Let a function \(f:\left( {0,\infty } \right) \to \left( {0,\infty } \right)\) be defined by \(f\left( x \right) = \left| {1 - \frac{1}{x}} \right|\). Then \(f\) isJEE Mains 2019 Hard
- In a game two players \(A\) and \(B\) take turns in throwing a pair of fair dice starting with player \(A\) and total of scores on the two dice, in each throw is noted. \(A\) wins the game if he throws a total of \(6\) before \(B\) throws a total of \(7\) and \(B\) wins the game if he throws a total of \(7\) before \(A\) throws a total of six The game stops as soon as either of the players wins. The probability of \(A\) winning the game isJEE Mains 2020 Hard
- If the domain of the function \(\log _5\left(18 x-x^2-77\right)\) is \((\alpha, \beta)\) and the domain of the function \(\log _{(x-1)}\left(\frac{2 x^2+3 x-2}{x^2-3 x-4}\right)\) is \((\gamma, \delta)\), then \(\alpha^2+\beta^2+\gamma^2\) is equal to :JEE Mains 2025 Easy