The wavelength and intensity of the incident light are `4000 overset(@)( A)` and `0.1(W)/m^2` respectively.What is the minimum change in the light energy? What is the number of incident photons?

The wavelength and intensity of the incident light is 4000 overset@ A and 0.1 W respectively. What is the minimum change in the light energy? What is the number of incident photons?

What is the effect of intensity of incident light on the photoelectric current?

Calculate the energy of a photon in a light of wavelength 5000overset@ A.

The wavelength of monochromatic light is 5000 overset (@)(A) in air . What will be its wavenumber in a medium of refractive index 1.5 ?

Calculate the energies of photons corresponding to ultraviolet light and red light, given that their wavelengths are 3000overset@ A and 7000overset@ A respectively.(Remember that the photon are not coloured. Colour is human perception for that frequency range.)

A ray of light strikes the glass slab at an angle of 50^@ .What is the angle of incidence?

The wavelength of a beam of light in glass is 4400 overset (@)(A) What is its wavelength in air , if refractive index of glass is 1.5 ?

Calculate the energy of a photon, in joule and eV, in a light of wavelength 5000 overset@A .

Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on the surface of a photosensitive material. If one per cent of the incident photons produce photoelectrons, then the number of photoelectrons emitted per second from an area of 1.0 cm^2 of the surface is nearly