photoelectric

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

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NGSS.HS-PS4-3

The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light

• Intensity

• Wavelength

• Frequency

• Energy

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NGSS.HS-PS4-1

NGSS.HS-PS4-4

What color of light has the greatest energy per photon?

• Red

• Green

• Blue

• Violet

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NGSS.HS-PS4-1

The photoelectric effect only occurs if the light shining on the metal is:

• coherent.
• above a minimum intensity.
• above a minimum frequency.
• above a minimum wavelength.

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NGSS.HS-PS4-3

NGSS.HS-PS4-4

This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model

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NGSS.HS-PS4-3

What is the best description of 'threshold frequency'?

• The minimum energy needed for electrons to escape a surface.

• The maximum kinetic energy that an emitted electron has.

• The minimum frequency of a photon that will cause an electron to be emitted.

• The frequency that an emitted electron will have.

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NGSS.HS-PS4-3

NGSS.HS-PS4-4

To release an electron the energy of the photon had to be more than

• zero
• the cut off frequency
• the work function
• the cut off wavelength

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NGSS.HS-PS4-4

the energy of the photon is ---------------

• hf
• h/f
• hf + Φ
• hf - Φ

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NGSS.HS-PS4-1

NGSS.HS-PS4-3

A metal with a work function of 3.5 eV is exposed to photons with an energy of 3.7 eV. What is the maximum kinetic energy of the emitted photoelectrons?

• 0.2 eV

• 0.9 eV

• 1.1 eV

• 7.7 eV

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NGSS.HS-PS4-3

NGSS.HS-PS4-4

What is the energy of a photon with a frequency of 5x10¹⁴ Hz? (you need to do calculation. You have enough time)

• 2.5x10^-19 J

• 3.0x10^-19 J

• 3.3x10^-19 J

• 4.5x10^-19 J

Tags

NGSS.HS-PS4-1