What voltage must be applied to an elecron microscope to produce electrons of wavelength `0.4 overset @A`?

What voltage must be applied to an electron microscope to produce electrons of wavelength 0.4 overset @A ?

The two slits in Young's double slit experiment are seprated by a distance of 0.03 cm.When light of wavelength 5,000 overset@A falls on the slits,nd interference pattern is produced on the screen 1.5 m away.Find the distance of 4th bright fringe from the central maximum.

What will be the wavelength of an electron of energy 500 eV?

The fringe width in a Young's double slit inter pattern is 2.4 xx 10^(-4)m ,when a red ligth of wavelength 6,400 overset @A is used.By how much will it change,if blue ligth of wavelength 4,000 overset@A is used?

What physical quantity is the same for X-rays of wavelength 10^-10 m, red light of wavelength 6800 overset @A and radiowaves of wavelength 500 m?

In a Young's double slit experiment,the fringe width obtained is 0.6 cm,when light of wavelength 4,800 overset @A is used .If the distance between the screen and the slit is reduced to half,what should be the wavelength of light used to obtain fringes 0.0045 m wide?