The ratio of area covered by second orbital to the first orbital is.

The ratio of area covered by second orbit to the first orbit is 1:1 , 1:16 , 8:1 , 16:1

The ratio of area covered by second orbit to the first orbit in hydrogen atom is :-

The ratio of the area covered by the second orbital to the first orbital is

The ratio of radius of second orbit of hydrogen to the radius of its first orbit is :

The ratio of radius of second orbit of hydrogen to the radius of its first orbit is :

The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is

The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is

When the electron in a hydrogen atom jumps from the second orbit to the first orbit , the wavelength of the radiation emitted is lamda . When the electron jumps from the third orbit to the first orbit , of the same atom , the wavelength of the emitted radiation would be

The ratio of the speed of an electron in the first orbit of hydrogen atom to that in the first orbit of He is