Question

Please help me with these two questions ​

Answer 1

⭐《ANSWER》

$\huge\mathfrak\pink {ANSWER}$

↪Actually welcome to the concept of the MODERN PHYSICS

↪Basically here , in the first question , since the ejection is only done , thus the K.E of the electron is Zero

↪thus we get as

〽phi = hc/ lambda°

↪and in the next question , h ( v - v° ) = K.E

Answer 2

Answer:

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