The longest wavelength of light capable to remove an electron from a sample of potassium metal is 1.136 x 10^-19 m.
The binding energy is the amount of energy needed to bind the electron to the element.
If energy equal to or more than the binding energy is provided, electrons will be removed from the metal.
The energy(E) of a light wave is calculated using the following formula,
E = hc/λ
In the above formula
h = Planck’s Constant = 6.626 x 10^-34 J s
c = speed of light
λ = wavelength of light
Putting E = 1.76 x 10^6 J in the formula
1.76 x 10^6 = 6.626 x 10^-34 x 3 x 10^8/lambda
λ = 1.136 x 10^-19 m.
Thus, the longest wavelength of light capable to remove an electron from a sample of potassium metal is 1.136 x 10^-19 m.
To know more about "binding energy", refer to the link below:
https://brainly.com/question/15718710?referrer=searchResults
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