Question
Question: The threshould frequency of a metal ‘M’ is 1.5 × 10<sup>15</sup> s<sup>–1</sup>. The maximum K.E. of...
The threshould frequency of a metal ‘M’ is 1.5 × 1015 s–1. The maximum K.E. of the photoelectrons, when the metal is irradiated with radiations of frequecny 2.5 × 1015 s–1, would be –
A
6.63 × 10–20 J
B
1.0 × 10–19 J
C
6.63 × 10–19 J
D
1.0 × 10–18 J
Answer
6.63 × 10–19 J
Explanation
Solution
K.E. = h (n – n 0)