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A beam of light has three wavelengths 41...

A beam of light has three wavelengths `4144 Å`, `4972 Å` and `6216 Å` with a total instensity of `3.6 xx 10^(-3) Wm^(-2)` equally distributed amongst the three wavelengths. The beam falls normally on an area `1.0 cm^2` of a clean metallic surface of work function 2.3 eV. Assume that there is no loss of light by reflection and that each energetically capable photon ejects on electron. Calculate the number of photo electrons liberated in two seconds.

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A beam of light has three wavelengths 4144 Å , and 6216 Å with a total instensity of 3.6 xx 10^(-3) Wm^(-2) equally distributed amongst the three wavelengths. The beam falls normally on an area 1.0 cm^2 of a clean metallic surface of work function 2.3 eV. Assume that there is no loss of light by reflection number of photoelectrons liberated in two seconds.

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A beam of light has three wavelengths 4000 Å, 5000 Å, 6000Å with a total intensity 3 xx 10^(-3) W//m^(2) equally distributed amongst the three wavelenth. The beam falls normally on an area 2 cm^(2) of clean metallic surface of work function 2.4 eV . Calculate photo current. (Assume each energetically suitable photon emits one electron)

A beam of light has an power of 144 W equally distributed among three wavelengths of 4100 Å , 4960 Å and 6200Å. The beam is incident at an angle of incidence of 60° on an area of 1 cm^(2) of a clean sodium surface, having a work function of 2.3 eV.Assuming that there is no loss of light by reflection and that each energetically capable photon ejects a photoelectron, find the saturation photocurrent. (Take h c//e = 12400 eVÅ )

A beam of light consists of four wavelength 4000Å , 4800 A, 6000 A and 7000 Å , each of intensity 1.5xx10^(-3)Wm^(-2) . The beam falls normally on an area 10^(-4)m^(2) of a clean metalic surface of work function 1.9 eV . Assuming no loss of light energy (i.e. each capable photon emits one electron) calculate the number of photoelectrons liberated per second.

A light source, emitting there wavelengths 500nm, 600nm and 700 nm, has a total power of 10^(-3) W and a beam diameter 2xx10^(-3)m . The density is distributed equally amongst the three wavelength. The beam shines normally on a metallic surface of area on 10^(-4) m^(2) and having a work function of 1.9 eV. Assuming that each photon liberates an electron, calculate the charge emitted per unit area in one second.

PHYSICS GALAXY - ASHISH ARORA-PHOTOELECTRIC EFFECT AND MATTER WAVES-Unsolved numerical problems
  1. A beam of light has three wavelengths 4144 Å, 4972 Å and 6216 Å with a...

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  2. Light from balmer series of hydrogen is able to eject photoelectron fr...

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  3. A photocell is operating in saturation mode with a photocurrent 4.8 mA...

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  4. Photo electrons are liberated by ultraviolet light of wavelength 3000 ...

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  5. Lithium has a work function of 2.3eV. It is exposed to light of wavele...

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  6. A parallel beam of monochromatic light of wavelength 663 nm is incide...

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  7. Ultraviolet light of wavelength 800 A and 700 A when allowed to fall ...

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  8. The work functin of aluminium is 4.2 eV. Calcualte the Kinetic energy ...

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  9. What potential difference must be applied to stop the fastest photoele...

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  10. A sphere of radius 1.00 cm is placed in the path of a parallel beam of...

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  11. Find the frequency of light which ejects electrons from a metal surfac...

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  12. state whether the following statements are TRUE or FALSE, giving reaso...

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  13. A point istropic light source of power P = 12 watt is located on the a...

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  14. A uniform monochromatic beam of light of wavelength 365xx10^(-9)m and ...

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  15. Light of wavelength 180 nm ejects photoelectrons from a plate of met...

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  16. Suppose the wavelength of the incident light is increased from 3000 Å ...

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  17. When a metal plate is exposed to a monochromatic beam of light of wave...

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  18. The energy needed to detach the electron of a hydrogen like ion in gro...

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  19. A stationary hydrogen atom emits a photon corresponding to first line ...

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  20. In an experiment tungsten cathode which has a threshold wavelength 230...

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  21. Electrons with maximum kinetic energy 3eV are ejected from a metla sur...

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