AP Physics 2easymcq1 pt
In the photoelectric effect, electrons are ejected only if the light's
A.frequency exceeds a threshold
B.intensity is high enough
C.color is red
D.direction is perpendicular
Explanation
Core Concept
Each photon must supply at least the work function.
Correct Answer
Afrequency exceeds a threshold
More Unit 7: Quantum, Atomic, and Nuclear Physics practice questions
- hardThe Bohr model explains hydrogen's spectrum but not
- hardX-rays are produced when
- hardWhich statement about radioactivity is correct?
- easyA photon's momentum is
- easyThe energy released in a nuclear reaction appears as
Practice more AP Physics 2 questions with full explanations
Practice Unit 7: Quantum, Atomic, and Nuclear Physics Questions →