Download App

Structure of Atoms and Nuclei — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsStructure of Atoms and Nuclei4 Marks
Question
State Bohr's third postulate for hydrogen $(H_2)$ atom. Derive Bohr's formula for the wave number. Obtain expressions for longest and shortest wavelength of spectral lines in ultraviolet region for hydrogen atom.
✓

Answer

coming soon

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following in Detail" from Structure of Atoms and Nuclei→Structure of Atoms and Nuclei — all question types→Physics STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Magnetic Resonance Imaging (MRI) technique used for medical imaging requires a magnetic field with a strength of 1.5 T and even upto 7 T. Nuclear Magnetic Resonance experiments require a magnetic field upto 14 T. Such high magnetic fields can be produced using superconducting coil electromagnet. On the other hand, Earth’s magnetic field on the surface of the Earth is about $3.6 \times 10^{-5} T = 0.36$ gauss.
→
State the causes of induced current and explain them on the basis of Lena's law.
→
Explain
(1) free vibrations
(2) forced vibrations.
→
Express Faraday-Lena's law of electromagnetic induction in an equation form.
→
A gas in a cylinder is at pressure P. If the masses of all the molecules are made one third of their original value and their speeds are doubled, then find the resultant pressure. 
→
Find the temperature of a blackbody if its spectrum has a peak at (a) $\lambda_{\max }=700 nm$ (visible), (b) $\lambda_{\max }=3 cm$ (microwave region) and (c) $\lambda_{\max }=3 m$ (short radio waves) (Take Wien's constant $b =2.897 \times 10^{-3} m K$ ).
→
Find the time required for a $50\ Hz$ alternating current to change its value from zero to the rms value.
→
Describe Faraday’s coil-coil experiment. What conclusion can be drawn from the experiment?
→
Define an ideal simple pendulum. Show that the motion of a simple pendulum under certain conditions is simple harmonic. Obtain an expression for its period.
→
Explain the conversion of a Moving Coil Galvanometer (MCG) into an ammeter. Obtain necessary formula.
→