AP Physics 2: Modern Physics 10: Photoelectric Effect Problem 2

Please visit twuphysics.org for videos and supplemental material by topic. These physics lesson videos include lectures, physics demonstrations, and problem-solving.
Ms. Twu's AP Physics B / AP Physics 1 and 2 lesson videos are designed for students who have never had physics before. These videos are also used for "flipped classroom" teaching at Eleanor Roosevelt High School.
Her AP Physics C lesson videos are designed for students who are at least taking pre-calculus concurrently.

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Thank u so much