The wavelength of th first spectral line of sodium 5896 Å . The fisrt excitation potential of sodium atomm will be (Planck's constant `h=6.63xx10^(-34) J-s)`

Give the order of the following : Planck's constant ( 6.63xx10^(-34) J-s)

The wavelength of yellow line of sodium is 5896 Å . Its wave number will be

The wavelength of line of sodium is 589.6 nm. Express it in Angstrom unit.

The stopping potential V_(0) (in volt) as a function of frequency (v) for a sodium emitter, is shown in the figure. The work function of sodium, from the data plotted in the figure, will be: (Given : Planck’s constant) (h) = 6.63 xx10^(-34)Js" electron charge "e=1.6xx10^(-19)C )

The stopping potential V_(0) (in volt) as a function of frequency (v) for a sodium emitter, is shown in the figure. The work function of sodium, from the data plotted in the figure, will be: (Given : Planck’s constant) (h) = 6.63 xx10^(-34)Js" electron charge "e=1.6xx10^(-19)C )

The de-Broglie wavelength of a tennis ball of mass 60g moving with a velocity of 10 ms^(-1) is approximately (planck's constant, h = 6.63 xx 10^(-34) Js)

The work function of a metallic surface is 2.5 eV. Ultraviolet light of wavelength 2000Å is allowed to be incident on the metallic surface. Calculate Stopping potential. (Given Planck's constant h = 6.63 xx 10^(-34) J-s , electronic charge e = 1.6 xx 10^(-19) C, electron mass m = 9.1 xx 10^( -31) kg

The momentum of a photon of de Broglie wavelength 5000Å is …………… . [Plank's constant =6.63xx10^(-34)J.s ]

A 160 watt light source is radiating light of wavelength 6200 Å uniformly in all directions. The photon flux at a distance of 1.8 m is of the order of (Planck's constant 6.63xx 10^(-34) J-s)