Describe the photoelectric effect.
The photoelectric effect is a phenomenom which occurs when photons strike a metal causing electrons to be released from the metal atoms. This occurs because the photons transfer their energy to the electrons in the atom's causing them to get enough energy to escape their energy shells.
IW
Related Physics GCSE answers
All answers ▸How do diodes work?
What is the Doppler effect?
What are the changes in energy that an object experiences when it is launched vertically at a given velocity into the air and falls back to the ground? This question ignores air resistance.
Describe one method by which the distance to stars from Earth is measured, and one modern improvement to this method which increases its accuracy.