RE-NEET Physics Structure Of Atom Class 11 Questions

In Geiger-Marsden experiment, the number of scattered α-particles N(θ) is plotted as a function of scattering angle θ. Which of the following options represents the correct plot?

Consider that an electron is revolving in an excited state of Hydrogen atom with velocity 2.56×10⁵ ms⁻¹. The radius of the orbit is xx×10⁻⁹ m. The value of x is: [Take the mass of electron to be 9×10⁻³¹ kg, charge of electron = 1.6×10⁻¹⁹ C and 1/4πε₀ = 9×10⁹ N m² C⁻²]

The spectral series which corresponds to the electronic transition from the levels n₂ = 5, 6,... to the level n₁ = 4 is

Some energy levels of a molecule are shown in the figure with their wavelengths of transitions. Then: