Q18.The radius of third stationary orbit of electron for Bohr's atom is R. The radius of fourth stationary orbit will be: (1) 4 R (2) 16 R 3 9 (3) 3 R (4) 9 R 4 16
What This Question Tests
This question links Ray Optics and Dual Nature of Matter by asking about the effect of changing a lens's focal length on the intensity of light falling on a photoelectric cell, thus influencing the photoelectric current.
Concepts Tested
📚 NCERT Sections This Tests
12.7 — The Radius Of The Innermost Electron Orbit Of A Hydrogen Atom Is
Physics Class 12 · Chapter 12
12.7 The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. What are the radii of the n = 2 and n =3 orbits?
12.6 — (A) Using The Bohr’S Model Calculate The Speed Of The Electron In A
Physics Class 12 · Chapter 12
12.6 (a) Using the Bohr’s model calculate the speed of the electron in a hydrogen atom in the n = 1, 2, and 3 levels. (b) Calculate the orbital period in each of these levels.
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
📋 Question Details
- Chapter
- Ray Optics
- Topic
- Lens and Photoelectric effect
- Year
- 2024
- Shift
- 27 Jan Shift 1
- Q Number
- Q18
- Type
- Multi concept
- NCERT Ref
- Class 12 Physics Ch 9: Ray Optics and Optical Instruments, Ch 11: Dual Nature of Radiation and Matter
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