Neon is generally used in sign boards. If is emits strongly at 616 nm, calculate:
The frequency of emission.

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

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

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

Two bodies of masses 1 kg and 3 kg respectively are connected rigidly by a vertical spring. The body of mass 3 kg rests on a smooth horizontal surface. The force constant of the spring is 484Nm^(-1) . From the equilibrium position, the mass of 1 kg is displaced vertically through a distance of 0.02 m and then released. calculate (i) and frequency of oscillation of the mass of 1 kg (ii) the maximum velocity of this mass (iii) its oscillation energy and (iv) the reaction of the table on the mass of 3 kg, when mass 1 kg is having harmonic oscillations.

A hot metal emits photon of light with energy 3.0 (10*-19) J. Calculate the frequency and wavelength of the photon ?

Electrons ar emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 A^(@). Calculate threshold frequency (v _(0)) and work function (w) of the metal.

In a photoelectric effect set up, a point source of light of power 3.2 xx10^(-3) W emits monoenergetic photons of energy 5eV.The source is located at a distance of a stationary metallic sphere of work function 3eV and radius 8xx10^(-3)m .The efficiency of photoelectron emission is one for every 10^(6) incident photons.Assume that the sphere is isolated and initially neutral and the photoelectrons are initially swept away after emission. Calculate the number of photoelectrons emitted per second.

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

The energy level diagram of an element is given below. Identify by doing necessary calculations, which transitions corresponds to the emission of a spectral line of wavelength 102.7nm

A 25 What bulb emits monochromatic yellow light of wavelength of 0. 75 um. Calculate the rate of emission of quanta per second.