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Monochromatic light incident on a metal ...

Monochromatic light incident on a metal surface emits electrons with kinetic energies ranging from 0 to 2.5 eV. What is the least energy of the incident photon, if for removing the tightly bound electron from the metal surface an energy of 4.3 eV is required ?

A

1.8 eV

B

6.8 eV

C

from 1.8 eV to 6.8 eV

D

3.4 eV

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The correct Answer is:
B
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MARVEL PUBLICATION-ELECTRONS AND PHOTONS -TEST YOUR GRASP - 17
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  9. Sodium and copper have work functions of 2.3 eV and 4.5 eV. The ratio ...

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  10. The surface of a metal is illuminated with light of wavelength 400 nm....

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  12. A lamp is placed at a distance of 8 cm from a photocell and the microa...

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  13. The cathode of a photoelectric cell is changed such that the work func...

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  14. The wavelength of the photons are 4500 Å and 6000 Å. The ratio of thei...

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  15. An AIR station is broadcasting the waves of wavelength 300 metres. If ...

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