AP EAMCET · PHYSICS · Dual Nature of Matter
If an electron in the excited state falls to ground state, a photon of energy 5 eV is emitted, then the wavelength of the photon is nearly
- A 748 nm
- B 598 nm
- C 398 nm
- D 248 nm
Answer & Solution
Correct Answer
(D) 248 nm
Step-by-step Solution
Detailed explanation
\( \lambda = \frac{hc}{E} \) \( \lambda = \frac{1240 \, \text{eV} \cdot \text{nm}}{5 \, \text{eV}} \) \( \lambda = 248 \, \text{nm} \)
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 elastic energy stored per unit volume in terms of longitudinal strain ' \(\epsilon\) ' and Young's modulus ' \(Y\) ' isAP EAMCET 2024 Easy
- A reverse biased zener diode when operated in the breakdown region works asAP EAMCET 2023 Easy
- For a molecule of an ideal gas, the number density is \(2 \sqrt{2} \times 10^8 \mathrm{~cm}^{-3}\) and the mean free path is \(\frac{10^{-2}}{\pi} \mathrm{cm}\). The diameter of the gas molecule isAP EAMCET 2018 Easy
- Assertion (A) : It is more difficult to push a magnet into a coil with more number of turns.
Reason (R) : The emf induced in a coil opposes the motion of a magnet when it is moved towards the coil.AP EAMCET 2017 Easy - Ionosphere acts as a reflector for the frequency range ofAP EAMCET 2025 Easy
- Two particles of equal mass ' \(m\) ' and equal charge ' \(q\) ' are separated by a distance of 16 cm . They do not experience any force. The value of \(\frac{q}{m}\) is _____ (if ' \(G\) ' is the universal gravitational constant and ' \(g\) ' is the acceleration due to gravity).AP EAMCET 2024 Easy
More PYQs from AP EAMCET
- If the angle between the circles and is , then a value of isAP EAMCET 2018 Easy
- The ratio of rates of diffusion of gases \(A\) and \(B\) is \(1: 0.707\). If the molecular weight of \(B\) is 32 , the molecular weight of \(A\) isAP EAMCET 2019 Easy
- A string of letters is to be formed by using 4 letters from all the letters of the word "MATHEMATICS". The number of ways this can be done such that two letters are of same kind and the other two are of different kind isAP EAMCET 2025 Medium
- Which of the following statements is not correct in respect of chemisorption?AP EAMCET 2016 Easy
- Find the transformed equation of \(x \cos \theta+y \sin \theta=p\), when the axes are rotated through an angle \(\theta\).AP EAMCET 2020 Medium
- Two of the products formed by the reaction of ' X ' with HCl are gases. What is ' X '?AP EAMCET 2024 Medium