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: [[Light]] [[Energy Transfer|transfers energy]] which can be [[Absorb (physics)|absorbed]] by a [[material]] causing [[electron]]s to gain [[energy]] and move.
: The '''photoelectric effect''' is used in digital cameras to make a picture. The [[light]] is [[focus|focused]] through a [[lens]] onto a detector which generates an [[Electrical Current|electrical current]] depending on the [[Intensity|intensity]] of [[light]].
==Key Stage 4==
===Meaning===
A '''photoelectric effect''' is when [[light]] causes an [[Electrical Current|electrical current]].
===About the Photoelectric Effect===
: [[Light]] [[Energy Transfer|transfers energy]] which can be [[Absorb (physics)|absorbed]] by a [[material]] causing [[electron]]s to gain [[energy]] and move.
: The '''photoelectric effect''' is used in digital cameras to make a picture. The [[light]] is [[focus|focused]] through a [[lens]] onto a detector which generates an [[Electrical Current|electrical current]] depending on the [[Intensity|intensity]] of [[light]].
==Key Stage 5==
===Meaning===
A '''photoelectric effect''' is a phenomenon in which [[electron]]s are emitted form the surface of a [[metal]] when light of a minimum [[Threshold Frequency|'threshold' frequency]] is incident upon its surface.
===About the Photoelectric Effect===
: The '''Photoelectric Effect''' is proof of the [[photon]] model of [[light]].
: The emission of [[photoelectron]]s depends upon the [[frequency]] of [[light]] incident upon a [[metal]]'s surface. Below the [[Threshold Frequency|threshold frequency]] there are no [[photoelectrons]] emitted.
: Below the [[Threshold Frequency|threshold frequence]] the intensity of the [[light]] has no effect on the emission of [[photoelectron]]s (none are emitted). However, above the [[Threshold Frequency|threshold frequence]] an increase in the intensity of [[light]] will increase the number of [[photoelectron]]s emitted, but will not affect their maximum [[Kinetic Energy|kinetic energy]].