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in Physics by (70.7k points)

The deBroglie wavelength, associated with electrons, accelerated through a potential V, equals λB. The threshold wavelength, for a given photosensitive surface is n λB (n > 1). If this photosensitive surface is irradiated with monochromatic radiation of wavelength (λB/n) , the stopping potential needed is VS

The relation, between VS and V, can be expressed as

1 Answer

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by (71.1k points)
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Best answer

Correct option : (1)

Explanation :

The work function, of the photosensitive surface = energy of a photon of its ‘threshold wavelength’ radiation = hc/nλB

Energy of a photon of the incident radiation 

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