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Q.

The kinetic energy of photoelectron emitted on irradiating a metal surface with frequency v is related by KE = hv - IE. The plots of K.E versus the incidental frequency v shows: 

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a

a straight line with extra-polated intercept on y-axis equal to ionization energy

b

a straight line with slope equal to Planck's constant 

c

a straight line with intercept on x-axis equal to threshold frequency

d

a straight line with intercept on x-axis equal to the product of threshold frequency and Planck's constant 

answer is A, B, C.

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Detailed Solution

solution

 

From figure it can be seen that, a straight line with intercept on x-axis equal to threshold frequency, a straight line with slope equal to Planck's constant,a straight line with extra plotted intercept on y-axis equal to ionization energy.

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