The wavelength of a spectral line of cesium is 550 nm. Calculate the frequency of the line.

The wavelength of a spectral line of cesium is 460 nm. calculate the frequency of the line.

The wavelength of blue light is 315 nm. calculate the frequency of this light.

The wavelength of first spectral line in the balmer series is 6561 angstrom. Calculate the wavelength of second spectral line in balmer series.

The wavelength of light the spectral emission line of sodium is 589 nm. Find the kinetic energy at which (a) an electron and (b) a neutron,would have the same de Broglie wavelength.

The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which a neutron, would have the same de-Broglie wavelength.

Yellow light emitted from a sodium lamp has a wavelength of 480 nm. Calculate the frequency of this light.

A metal has thresold wavelength at 6400 overset @A . Calculate thtesold frequency

The wavelength of X-rays is 1 overset@A .Calculate its frequency.

A slt of width a illuminated by mono-chromatic ligth of wavelength 650 nm at normal incidence .Calculate the value of a when the first minimum falls at an angle of diffraction of 30^@ ,

A slt of width a illuminated by mono-chromatic ligth of wavelength 650 nm at normal incidence .Calculate the value of a when the first maximum falls at an angle of diffraction of 30^@ .