Physics

Q321

In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

Q322

In Compton scattering, the change in wavelength is maxed if_______________?

Q323

In Davisson-Germer experiment the diffracted proton from crystal shows______________?

Q325

In forward bias the width of potential barrier_____________?

Q327

In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

Q328

In laser production upper state condition is_____________?

Q329

In multimode step index fibre the refractive index of core and cladding is____________?

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