Understanding the Photoelectric Effect

What does an electroscope measure?

• Magnetic field strength

• Electric charge

• Gravitational pull

• Light intensity

Tags

NGSS.MS-PS2-3

What common household item was used to transfer electrons to the electroscope?

• Plastic spoon

• Cotton cloth

• Glass rod

• Balloon

Why does the electroscope needle move?

• Due to heat expansion

• Because of light exposure

• Due to electric charge accumulation

• Because of air pressure

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What was the initial method used to demonstrate the photoelectric effect?

• Using a battery

• Applying a magnetic field

• Shining light on the electroscope

• Connecting to a high voltage source

Why did visible light fail to move the electroscope's needle?

• Insufficient photon energy

• Incorrect light color

• Too much light intensity

• Electroscope malfunction

Tags

NGSS.HS-PS4-3

What type of ultraviolet light was first tested on the electroscope?

• Infrared light

• Medium wave UV light

• Longwave UV light

• Shortwave UV light

Tags

NGSS.HS-PS4-4

Which type of UV light successfully discharged the electroscope?

• None of the above

• Visible UV light

• Shortwave UV light

• Longwave UV light

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

What did Einstein win the Nobel Prize for?

• Theory of relativity

• Discovery of the electron

• Explanation of the photoelectric effect

• Development of quantum mechanics

What property of light does not affect its ability to knock electrons loose?

• Photon mass

• Brightness

• Frequency

• Wavelength

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

How does the photoelectric effect demonstrate light's particle nature?

• By showing light can be blocked

• By light's ability to knock electrons loose

• By changing light's color with filters

• By demonstrating light's wave interference

Tags

NGSS.HS-PS4-3