Photoelectric effect

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

Tags

NGSS.HS-PS4-3

What color of light has the greatest energy per photon?

• Red

• Green

• Blue

• Violet

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-4

This image is an illustration of

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

Tags

NGSS.HS-PS4-1

Light of a given wavelength is used to illuminate the surface of a metal. However, no photoelectrons are emitted. In order to cause electrons to be ejected, light of __________ should be used.

• lower energy

• higher intensity

• shorter frequency

• higher frequency

Tags

NGSS.HS-PS4-3

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

What is the energy of a photon with a frequency of 5x10¹⁴ Hz? (you need to do calculation. You have enough time) h=6.6x10^-34 J/Hz

• 2.5x10^-19 J

• 3.0x10^-19 J

• 3.3x10^-19 J

• 4.5x10^-19 J

Tags

NGSS.HS-PS4-1

A surface has a work function of 4 x 10⁻¹⁹ J

What is the threshold wavelength?

h = 6.6 x 10⁻³⁴ Js

c = 3 x 10⁸ ms⁻¹

• 6.0 x 10⁻¹⁴ m

• 700nm

• 5 x 10⁻⁷ m

• 3 x 10⁻⁶ m

Tags

NGSS.HS-PS4-1

The speed of light (c) =

• 3 x 10⁸ miles/hour
• 3 x 10⁸ meters/second
• 3 x 10⁸ kilometers/hour
• none of these

Tags

NGSS.HS-PS4-1

The special theory of relativity was derived by:

• Galileo
• Newton
• Einstein
• Sitter

The wave-particle duality of light describes light as...

• a wave only
• a particle only
• both a wave and a particle
• neither a wave nor a particle

Tags

NGSS.HS-PS4-3