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Question Number 61993 by necx1 last updated on 13/Jun/19

u l t r a v i o l e t l i g h t o f w a v e l e n g t h 300 \times 10^{- 9} m

c a u s e s p h o t o n e m i s s i o n s f r o m a s u r f a c e

T h e s t o p p i n g p o t e n t i a l i s 6 V . F i n d t h e

w o r k - f u n c t i o n i n e l e c t r o n - V o l t s

Answered by ajfour last updated on 13/Jun/19

h ν = ϕ + {e V}_{0}

ϕ = \frac{h c}{λ} - {e V}_{0}

= (\frac{6.626 \times 10^{- 34} \times 3 \times 10^{8}}{1.6 \times 10^{- 19} \times 300 \times 10^{- 9}} - 6) e V

= 4.14 - 6 < 0

(W r o n g d a t a!) .

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