What is the value of 1 nm?

The spectral line at 434 nm in the Balmer series of the hydrogen spectrum corresponds to a transition from nth orbit. What is the value of n?

What is the value of angular fringe width if fringe width is = 0.4 nm and separation between slit and screen is 2m.

The wavelength of a certain line in the Pashchen series is 1093.6nm . What is the value of n_(high) for this line [R_(H)=1.0973xx10^(-7)m^(-1)]

The wavelength of a certain line in the Pashchen series is 1093.6nm . What is the value of n_(high) for this line [R_(H)=1.0973xx10^(-7)m^(-1)]

The wavelength of a certain line in the Pashchen series is 1093.6nm . What is the value of n_(high) for this line [R_(H)=1.0973xx10^(-7)m^(-1)]

What is the ratio of 1nm to cm?

On earth, the value of G = 6.67 xx 10^(-11) Nm^(2)// kg^(2) . What is its value on the moon ?