What is the maximum kinetic energy of electrons ejected from barium when illuminated by white light, to 750 nm?

J

Explanation:

The complete statement is given as

What is the maximum kinetic energy of electrons ejected from barium (Wo = 2.48 eV) when illuminated by white light, 400 nm to 750 nm ?

= wavelength of the white light = 400 nm = 400 x 10⁻⁹ m

= speed of white light = 3 x 10⁸ ms⁻¹

Energy of the white light is given as

= Work function of barium = 2.48 eV = 2.48 x 1.6 x 10⁻¹⁹ J

= Maximum kinetic energy

Using photoelectric equation we have

pe = weightxheight = 2000x1000=2,000,000joules

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.