Changes

: [[Light]] [[Energy Transfer|transfers energy]] which can be [[Absorb (Physicsphysics)|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 [[Digital CameraElectrical 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 frequency]] the intensity of the [[light]] has no effect on the emission of [[photoelectron]]s (none are emitted). However, above the [[Threshold Frequency|threshold frequency]] 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]].