Question

maths thearom 6.3 chapter 6​

Answer 1

Answer:

In 1953, businessman Ernst Kronreif became a sizable shareholder of the company which was renamed and registered as Kronreif & Trunkenpolz Mattighofen.

Step-by-step explanation:

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Answer 2

refer to attachment

$\huge\underline{\boxed{\sf ANSWER}}$

Work function is the minimum energy required by an electron to just escape from the metal surface as to overcome the restraining forces at the surface of metal.

According to Einstein's photoelectric equation the work function of metal is given by :

∴ϕ=$\frac{hc}{λ}$−KE max

ϕ=$\frac{6.6\times 10^-34\times 3\times 10^8}{4000 \times 10^-10}$-2eV

=3eV−2eV=1eV