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One milliwatt of light of wavelength 456...

One milliwatt of light of wavelength 4560 A is incident on a cesium surface. Calculate the photoelectric current liberated assuming a quantum efficiency of 0.5 %. Given Planck's constant `h=6.62xx10^(-34)J-s` and velocity of light `c=3xx10^(8)ms^(-1)`.

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The correct Answer is:
`I= eta.(P)/(E_(lambda))xx(e )/(100)=1.84xx10^(-6)amp`
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RESONANCE-ATOMIC PHYSICS-Exercise 1 Part-1 subjective questions
  1. The electric field associated with a monochromataic beam of light beco...

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  2. One milliwatt of light of wavelength 4560 A is incident on a cesium su...

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

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  4. The magnetic field at a point associtated with a light wave is B=2xx10...

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  5. In an experiment on photoelctric effect, light of wavelength 800 nm ( ...

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  6. In a photoelectric effect experiment, photons of energy 5 eV are incid...

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  7. When the sun is directly overhead, the surface of the earth receives 1...

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

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  9. A beam of white light is incident normally on a plane surface absorbin...

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  10. Calculate the number of photons emitted per second by a 10 W sodium va...

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

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  12. Two identical non-relativitic partcles A and B move at right angles to...

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  13. Find the numerical value fo De Broglie wavelength of an electron in th...

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  14. Find the radius and energy of He^(+) ion in the states (a) n=2, (b) n=...

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  15. A positive ion having just one electron ejected it if a photon of wave...

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  16. Find the temperature at which the average kinetic energy of the molecu...

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  17. A monochromatic light soure of frequency f illuminates a metallic sur...

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  18. Find the smallest wavelength in emission spectra of (a) hydrogen, (b) ...

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  19. Calculate the angular frequency of revolution of an electron occupying...

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  20. Find the quantum number n corresponding to the excited state of He^(+)...

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