Physics-
General
Easy

Question

The graph between 1 divided by lambda comma wherelambda is wavelength of incident light and stopping potential (V) of three metals having work functions phi subscript 1 end subscript comma phi subscript 2 end subscript and phi subscript 3 end subscript in an experiment of photo-electric effect is plotted as shown in the figure. Which of the following statements is correct?

  1. Ratio of work function phi subscript 1 end subscript colon phi subscript 2 end subscript colon phi subscript 3 end subscript equals 1 colon 2 colon 4    
  2. Ratio of work function phi subscript 1 end subscript colon phi subscript 2 end subscript colon phi subscript 3 end subscript equals 4 colon 2 colon 1    
  3. tan theta is inversely proportional to fraction numerator h c over denominator e end fraction comma where h is Planck's constant and c is the speed of light    
  4. The violet colour light can eject photoelectrons from metals 2 and 3    

The correct answer is: Ratio of work function phi subscript 1 end subscript colon phi subscript 2 end subscript colon phi subscript 3 end subscript equals 1 colon 2 colon 4

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