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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.

A beam of light has two wavelengths 4,972Å and 6,216Å with a total intensity of 3.6xx10^(-3) W m^(-2) equally distributed among the two wavelengths . The beam falls normally on an area of 1 cm^2 of clean metallic surface of work function 2.3 eV . Assume that there is no loss of light by reflection and that each capable photon ejects one electron. The number of photoelectrons liberated in 2 s is approximately

A beam of light has three lambda, 4144 "Å", 4972 "Å" "and"6216 "Å" with a total intensity of 3.6 xx10^(-3) Wm^(-2) equally distributed amongst the three lambda. The beam falls normally on an area 1.0 cm^(2) of a cleam metallic surface of work function 2.3 eV. Assume that there is no loss of light by reflection etc. Calculate the no. of photoelectrons emitted in 2 sec, in scientific notation, x xx 10^(y) find the value of y.

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.

SL ARORA-ELECTRONS AND PHOTONS-Problem Solution
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