Diffraction and Interference

What type of interference is represented in this diagram?

• Constructive

• Destructive

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NGSS.MS-PS4-1

What type of interference is represented in the diagram?

• Constructive

• Destructive

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NGSS.MS-PS4-1

What's happening at A?

• Two crests are combining to create constructive interference.

• A crest and a trough are combining to create destructive interference.

• Two crests are combining to create destructive interference.

• A crest and trough are combining to create constructive interference.

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NGSS.HS-PS4-1

What is happening at B?

• Two crests are combining to create constructive interference.

• A crest and a trough are combining to create destructive interference.

• Two crests are combining to create destructive interference.

• A crest and a trough are combining to create constructive interference.

Tags

NGSS.HS-PS4-1

Two longitudinal waves overlap.  Compressions overlap with compressions.  Rarefactions overlap with rarefactions.  The waves are

• In-phase
• Out-of-phase
• In-synchronicity
• Out-of-synchronicity

Interference effects observed in the early 1800s

were instrumental in supporting a concept of the

existence of which property of light?

• Polarization

• Particle nature

• Wave nature

• Electromagnetic character

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NGSS.HS-PS4-3

The term coherence relates to ______.

• the phase relationship between two waves

• the polarization state of two waves

• the diffraction of two waves

• the amplitude of two waves

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NGSS.HS-PS4-3

NGSS.HS-PS4-5

Which of the following figures represent is a double

slit interference pattern?

• A

• B

• C

• D

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NGSS.HS-PS4-3

What does one observe on the screen in a Young's experiment if white light illuminates the double slit instead of light of a single wavelength?

• A white central fringe and no other fringes

• A dark central fringe and a series of alternating white and dark fringes on each side of the center

• A white central fringe and a series of colored and dark fringes on each side of the center

• A continuous band of colors with no dark fringes anywhere

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NGSS.HS-PS4-1

In a Young's double slit experiment, green light is

incident on the two slits. The interference pattern is

observed on a screen. Which one of the following

changes would cause the fringes to be more closely

spaced?

• Reduce the slit separation distance

• Use red light instead of green light

• Use blue light instead of green light

• Move the screen farther away from the slits

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