A) 1:2
B) 2:1
C) 4:1
D) 1:4
Correct Answer: B
Solution :
Work function is given by \[\text{o }\!\!|\!\!\text{ =}\frac{hc}{\lambda }\] or \[\text{o }\!\!|\!\!\text{ }\propto \frac{1}{\lambda }\] \[\because \] \[\frac{\text{o}{{\text{ }\!\!|\!\!\text{ }}_{1}}}{\text{o}{{\text{ }\!\!|\!\!\text{ }}_{2}}}=\frac{{{\lambda }_{2}}}{\lambda {{ & }_{1}}}=\frac{600}{300}=\frac{2}{1}\]
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