JEE Advanced 2026 Physics question

Consider a hydrogen atom with , , and denoting the velocity, orbital radius and kinetic energy of the electron in the orbit, respectively. The electron undergoes a transition from the orbit to 1st orbit, emitting radiation corresponding to the Lyman series. Considering h to be the Planck's constant and the permittivity of the free space, the correct statement(s) is/are:

• (A)Magnitude of change in kinetic energy of electron can be expressed as .Correct
• (B)Magnitude of change in de Broglie wavelength of the electron can be expressed as .
• (C)Frequency of the radiation emitted can be expressed as .Correct
• (D)Magnitude of change in total energy of the electron can be expressed as .