If radiation of allow wavelengths from ultraviolet to infrared is passed through hydrogen agas at room temperature, absorption lines will be observed in the :
Lyman series
Balmer series
both $(A)$ and $(B)$
neither $(A)$ nor $(B)$
In Bohr model of hydrogen atom, the force on the electron depends on the principle quantum number as
In Rutherford's experiment, number of particles scattered at $90^{\circ}$ angle are $x$ per second. Number particles scattered per second at angle $60^{\circ}$ is
In Bohr model of hydrogen atom, the force on the electron depends on the principal quantum number as
Based on which experiment did the Rutherford nuclear model come from?
In the spectrum of hydrogen atom, the ratio of the longest wavelength in Lyman series to thelongest wavelength in the Balmer series is