Home
Class 12
PHYSICS
Ultraviolet light of wavelength 2271Å fr...

Ultraviolet light of wavelength `2271Å` from a 100W mercury source irradiates a photocell made of molybdenum metal. If the stopping potential is 1.3V, estimate the work function of the metal. How would the photocell respond to a high intensity `(~10^(5)Wm^(-2))` red light of wave length `6328Å` produced by a He-Ne laser?

Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    SL ARORA|Exercise Problem Solution|19 Videos

  • ELECTRONS AND PHOTONS

    SL ARORA|Exercise TYPE A : Problem For Self Practice|21 Videos

  • ELECTROMAGNETIC WAVES

    SL ARORA|Exercise Problem for self-practice|21 Videos

  • ELECTROSTATIC FORCES, CHARGES AND FIELDS

    SL ARORA|Exercise Problems For Self Practice|1 Videos

Similar Questions

Explore conceptually related problems

An ultraviolet light of wavelength 2000 Å irradiates a photo cell made of molybdenum metal . If the stopping potential is -1.5 V , what is the work function of the metal ?

A low intensity ultraviolet light of wavelength 2271Å irradiates a photocell made of molybdenum metal. If the stopping potential is 1.3V, find the work function of the metal. Will the photocell work if it is irradiated by a high intensity red light of wavelength 6328Å ?

For intensity I of a light of wavelength 5000 Å the photoelectron saturation current is 0.40 mu A and stopping potential is 1.36 V , the work function of metal is

Amonochromatic light source of power 5mW emits 8 xx 10^15 photons per second. This light ejects photoelectrons from a metal surface. The stopping potential for this set up is 2V. Calculate the work function of the metal.

A monochromatic light source of intensity 5 m W emits (8x10^15) photons per second . This light ejects photoelectrons from a metal surface. The stopping potential for this setup is 2.0 V. Calculate the work function of the metal.

A photon of wavelength 1000 Å has energy 12.3 eV . If light of wavelength 5000 Å , having intensity I, falls on a metal surface, the saturaion current is 0.40 mu A and the stopping potential is 1.36 V . The work function of metal is

Light of wavelength 4000 Å falls on a photosensitive metal and a negative 2 V potential stops the emitted electrons. The work function of the material ( in eV) is approximately ( h = 6.6 xx 10^(-34) Js , e = 1.6 xx 10^(-19) C , c = 3 xx 10^(8) ms^(-1))