JEE PYQ: Atomic Structure Question 40
Question 40 - 2019 (10 Jan Shift 1)
Which of the graphs does not represent the relationship between incident light and electron ejected from metal surface?
(1). (K.E. of e’s vs Energy of light)
(2). (K.E. of e’s vs Frequency of light (step function))
(3). (K.E. of e’s vs Frequency of light (through origin))
(4). (K.E. of e’s vs Intensity of light)
Show Answer
Answer: (3)
Solution
K.E. vs frequency should not pass through origin; it starts only after threshold frequency $\nu_0$.