Photoelectric Effect – Lecture Review

A set of fill-in-the-blank flashcards covering definitions, formulas, and conceptual outcomes related to the photoelectric effect.

The photoelectric effect is the process in which electrons are ejected from a metal surface when _ of suitable frequency is incident on it.

light

The minimum frequency required to eject electrons from a metal surface is called the __.

threshold frequency (f₀)

If the incident light has a frequency lower than the threshold frequency (f < f₀), __ electrons are emitted.

no

When the incident light frequency equals the threshold frequency (f = f₀), electrons are emitted with __ kinetic energy.

zero

The minimum energy needed to remove an electron from a metal surface is known as the __.

work function (W₀)

The work‐function equation is W₀ = __ × f₀.

h (Planck’s constant)

The energy conservation equation for an emitted photoelectron is hf = __ + KE.

h f₀

In the energy equation, the kinetic‐energy term is expressed as KE = __mv².

½

Increasing the frequency of incident light (while above f₀) increases the __ of emitted electrons.

kinetic energy

Increasing the intensity of incident light increases the __ of electrons emitted per second.

number

Increasing intensity alone has __ effect on the kinetic energy of individual photoelectrons.

no

Solar panels, photoelectric diodes, and light sensors are common __ of the photoelectric effect.

applications