Photoelectrons from a material with a binding energy of 2.71 ev are ejected by 450 nm photons. once ejected, how long (in s) does it take these electrons to travel 2.60 cm to a detection device?

The time is

Explanation:

Given that,

Energy = 2.71 eV

Length = 450 nm

Distance = 2.60 cm

We need to calculate the speed of photon

Using formula of photoelectric emission

Where, K.E = kinetic energy

h = Planck constant

Put the value into the formula

We need to calculate the time

Using formula of distance

Put the value into the formula

Hence, The time is

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