Exit Check 7.4 - Wave Particle Duality

7.4.1

Which of the following best describes the wave behavior known as diffraction?

• The bending of a wave when changing medium

• The bending of a wave around a barrier or obstacle

• The changing of a wave's direction when hitting a boundary

• The changing of a wave's speed when changing medium.

Answer explanation

This question links to success criteria 7.4.1: I can identify behaviors that show light is a wave.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

7.4.1

Which of the following are behaviors of light which are best explained by treating light as a wave?

• 
• 
• 
• 

Answer explanation

This question links to success criteria 7.4.1: I can identify behaviors that show light is a wave.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

7.4.1

Why does the pencil in the water not line up with the pencil in the air?

• There are actually two different pictures

• The light bends while it is in the water because it changed medium

• Photoshop

• The light is bending around the pencil

Answer explanation

This question links to success criteria 7.4.1: I can identify behaviors that show light is a wave.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.MS-PS4-2

7.4.2

A Photon is

• A type of torpedo

• A small ball of light energy

• The positive particle in an atom

• A very large amount of mass

Answer explanation

This question links to success criteria 7.4.2: I can explain how the photoelectric effect supports the particle nature of light.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

7.4.2

The energy of photoelectrons emitted from a metal surface can be increased by

• using light of higher frequency.

• using light of longer wavelength.

• using light of higher intensity.

• using monochromatic, polarized light.

Answer explanation

This question links to success criteria 7.4.2: I can explain how the photoelectric effect supports the particle nature of light.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS4-3

7.4.2

This image is an illustration of

• photoelectric effect

• Dalton's atomic theory

• Bohr model

• Quantum mechanical model

Answer explanation

This question links to success criteria 7.4.2: I can explain how the photoelectric effect supports the particle nature of light.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS4-3

7.4.2

Which of the following best explains why the wave model does not explain this image well?

• Increasing the frequency of the light increases the number of electrons released. Increasing the intensity does not.

• The Electrons move in straight lines, not wiggly ones.

• Increasing the intensity of the light increases the number of electrons released. Increasing the frequency does not.

• The red waves should show a longer wavelength if it used the wave model.

Answer explanation

This question links to success criteria: I can explain how the photoelectric effect supports the particle nature of light.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

7.4.3

How can a light be used to cut something in a laser cutter?

• The light waves transfer enough heat energy to melt or burn the material.

• The photons knock free all of the electrons in the material.

• The Light wave makes the material vibrate, or wiggle, until it rips in half

• The device has a tiny light saber in it.

Answer explanation

This question links to success criteria 7.4.3: I can use photons to explain different applications of light.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS3-4

7.4.3

How can a light be used to disinfect things?

• High energy photons can enter living cells and damage them, killing harmful bacteria and viruses

• Photons hit the bacteria until it just decides to go live somewhere else

• Photons transfer heat until the bacterial all get cooked.

• The light waves transfer kinetic energy to the bacteria making them move away

Answer explanation

This question links to success criteria 7.4.3: I can use photons to explain different applications of light.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.MS-PS4-1