Monochromatic light of frequency $f$ incident on emitter having threshold frequency $f_{0}$ . The kinetic energy of ejected electron will be:-

h f

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h (f - f_{0})

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h f_{0}

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h (f + f_{0})

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Solution

The correct option is C $h (f - f_{0})$
Using Einstein equation for photolectric effect,
$K E_{m a x} = E - W$
$E = h f$ , incident energy
$W = h f_{0}$ , work function
so $K E_{m a x} = h f - h f_{0} = h (f - f_{0})$

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Monochromatic light of frequency f incident on emitter having threshold frequency f0. The kinetic energy of ejected electron will be:-

The correct option is C h(f−f0)Using Einstein equation for photolectric effect, KEmax=E−WE=hf, incident energyW=hf0, work functionso KEmax=hf−hf0=h(f−f0)

Monochromatic light of frequency $f$ incident on emitter having threshold frequency $f_{0}$ . The kinetic energy of ejected electron will be:-

The correct option is C $h (f - f_{0})$
Using Einstein equation for photolectric effect,
$K E_{m a x} = E - W$
$E = h f$ , incident energy
$W = h f_{0}$ , work function
so $K E_{m a x} = h f - h f_{0} = h (f - f_{0})$