The ratio of velocities of proton and - particle is 4:1, then he ratio of their de-brohlie wavelength is
The frequency of the line k line of the characteristtis X – rays spectrum is proportional to.
50% of X – rays oltained from a Coolidge tukie pass through 0.3mm thick alminium fail. If the P.D. letueen thew target and the cathode is increased.then the fractuion of X – rays passing from fail will be.
The threshold wavelength of sodiam metal is 6800the work function is:
The work function of a sulsstance is 4.0ev the longest wavelength of light that can cause photoelectron emission from this sulsstance is opprinately.
Potential energy of li2t electron is
The slope of frequency of incident light and stopping potential for a given surface will be.
If is the radsies of the first orbit of hydrogen atom, then the radii of second, third and forth orbit in terms of us.
Which of the following. Species will produe the shorte wavelength for thetransition n = 2 to n = ?
The de- Broglie wavelength associated with proton changes by 0.25%. if its momentum is changed by the initial momentum was
Cut-off wavelength for continous x – rays coming from x – rays tulie operating at 40 kv: