AP Physics Essentials: Photons and the Photoelectric Effect

This video tutorial by Mr. Anderson covers the concept of photons, the photoelectric effect, and the dual nature of light as both waves and particles. It explains how Einstein's work in 1905 helped to understand the photoelectric effect, where UV light can eject electrons from metal surfaces. The video also discusses the quantization of photons, spectral lines, and the electromagnetic spectrum, highlighting the relationship between frequency and energy. A simulation of the photoelectric effect is demonstrated, showing how different frequencies affect electron emission and energy generation.

What phenomenon allows a touch light to be activated by UV light?

• Chemical reaction

• Photoelectric effect

• Thermal expansion

• Magnetic induction

Who explained the photoelectric effect and contributed to the understanding of photons?

• Isaac Newton

• Albert Einstein

• Niels Bohr

• James Clerk Maxwell

What happens to the energy of a photon as its frequency increases?

• It decreases

• It becomes zero

• It remains constant

• It increases

Which type of electromagnetic wave has the highest frequency?

• Microwaves

• Infrared waves

• Radio waves

• Gamma rays

What evidence first suggested that light exists in discrete units?

• Reflection of light

• Refraction of light

• Spectral lines

• Continuous spectrum

What happens when an electron moves to a higher energy level?

• It emits a photon

• It absorbs a photon

• It loses energy

• It becomes a proton

In the photoelectric effect, what is the relationship between frequency and energy?

• Exponential relationship

• Linear relationship

• No relationship

• Inverse relationship

What happens when the wavelength of light is decreased in the photoelectric effect?

• Frequency decreases

• Energy decreases

• Frequency increases

• No change occurs

What is the formula for the energy of a photon?

• Energy = Plank's constant x frequency

• Energy = speed of light / frequency

• Energy = frequency / Plank's constant

• Energy = mass x speed

What is the result when a photon kicks off an electron in the photoelectric effect?

• A magnetic field is created

• A chemical reaction occurs

• A current is generated

• A sound wave is produced