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The threshold frequency of a metal is 4 × 10 14 s –1 . The minimum energy which photons must possess to produce photoelectric effect with the metal is (h = 6.6 × 10 –34 Js) (A) 3.06 × 10 –12 J (B) 1.4 × 10 –48 J (C) 3.4 × 10 –19 J (D) 6.023 × 10 –19 J



The threshold frequency of a metal is 4 × 1014 s–1. The minimum energy which photons must possess to produce photoelectric effect with the metal is (h = 6.6 × 10–34 Js)


(A)    3.06 × 10–12 J


(B)    1.4 × 10–48 J


(C)    3.4 × 10–19 J


(D)    6.023 × 10–19 J


Grade:11

1 Answers

Amit Saxena
35 Points
7 years ago
  1. Threshold energy required for emission

 

= hv0 = 6.6 × 10–34 × 4 × 1014

 

= 2.64 × 10–19 J

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