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Jeopardy Rules - PowerPoint PPT Presentation

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Jeopardy Rules. State your answers in the form of a question. Teams are chosen randomly to select each clue. When a team selects a clue, every team solves it. If the team who selects the clue is incorrect, another randomly selected team gets to try, until the answer is found.

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Jeopardy Rules

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Jeopardy Rules

  • State your answers in the form of a question.
  • Teams are chosen randomly to select each clue.
  • When a team selects a clue, every team solves it.
  • If the team who selects the clue is incorrect, another randomly selected team gets to try, until the answer is found.
  • There are two Daily Doubles, where a team can wager their winnings on a clue. Only one team may wager.
  • Correct answers gain a team the dollar value, incorrect answers subtract the dollar value.


Choose a category.

You will be given the answer.

You must give the correct question.


wave properties 100
Wave Properties - $100

This wave property is the inverse of the period of a wave.


Wave Properties - $100

What is the frequency?

f = 1/T


Wave Properties - $200

A particle in a transverse wave oscillates about this place.


Wave Properties - $200

What is its equilibrium position?


Wave Properties - $300

A longitudinal wave is composed of these types of regions.


Wave Properties - $300

What are compressions and rarefactions?

Compressions are regions of high pressure. Rarefactions are regions of low pressure.


Wave Properties - $400

A wave pulse traveling down a rope is measured to be 0.3 m from trough to crest. The amplitude of the pulse is this.


Wave Properties - $400

What is 0.15 m?

Amplitude is measured from the equilibrium position. If crest to trough is 0.3 m, then A = 0.3m/2 = 0.15 m.


Wave Properties - $500

A beach goer observes a set of 6.5 ocean waves equaling the length of a 26 m dock. The wavelength of a wave is this.


Wave Properties - $500

What is 4 m?

If 6.5 waves have a length of 26 m, then 1 wave has a wavelength of 26 m/6.5 = 4 m


Propagation Nation - $100

A transverse wave passes through a uniform medium from left to right. The vibration of the particles is in this direction.


Propagation Nation - $100

What is up and down?

In a transverse wave, the particles move perpendicular to the direction of the propagation.


Propagation Nation - $200

A sound wave is traveling at 345 m/s.

If it has a wavelength of 1.5 meters,

this is its period.


Propagation Nation - $200

What is 0.0043 s?

v=f*λ to solve for f and then the period T = 1/f.


Propagation Nation - $300

The energy of a mechanical wave is related to this.


Propagation Nation - $300

What is the amplitude?

Like a stretched spring with energy 1/2kx2 (i.e. energy ∝ x2, withx the displacement from equilibrium) , the energy of a wave is proportional to A2 (with A the displacement from equilibrium).


Propagation Nation - $400

When a wave travels in a single medium, this remains constant. When a wave crosses a boundary, this remains constant. (2 part answer)


Propagation Nation - $400

What are speed and frequency?

A wave’s speed is constant in one medium, but it’s frequency remains constant when crossing a boundary.


Daily Double

Make your wager, up to your current winnings. You will have 30 seconds to answer.


Daily Double

Red light produces a 2 slit diffraction pattern with some ∆X. In order to produce a pattern with the same ∆X using purple light, this must happen to the distance between slits, all other variables remaining constant.


Daily Double

What is decrease?


λpurple is shorter than red, so ∆X will decrease. Thus, d must decrease to increase ∆X.


Wave Funomena I - $100

By increasing the frequency of a sound, you are increasing this.


Wave Funomena I - $100

What is the pitch?

The pitch of a sound is measured by its frequency.


Wave Funomena I - $200

Whenever you listen to a particular song, the glass in your coffee table vibrates loudly. The vibrations are due to this effect.


Wave Funomena I - $200

What is resonance?

When a frequency matches the natural frequency of a system, it stimulates oscillations in that system.


Wave Funomena I - $300

Polarized sunglasses block glare off of water because the polarization of the reflected light is oriented this way with the transmission axis of the polarizer.


Wave Funomena I - $300

What is perpendicular?

Light reflected off of non-metallic surfaces is polarized in the plane of the surface. If the transmission axis of the polarizer is perpendicular to the plane, the light will be blocked.


Wave Funomena I - $400

These properties change when a wave reflects off a barrier.


Wave Funomena I - $400

What are direction and phase?

Reflected waves from a fixed boundary are 180° out of phase with the incident wave and obey the law of reflection.


Wave Funomena I - $500

In Lake 1, waves with λ=0.3m pass through an opening with width 0.25m. In Lake 2, waves with λ=0.5m pass through an opening with width 2.0 m. Waves in this lake undergo more of this effect. (2 part answer)


Wave Funomena I - $500

What is Lake 1, diffraction?

Noticeable diffraction occurs when the wavelength is comparable in size to the opening.


Wave Funomena II - $100

This is the part of a standing wave with maximum amplitude.


Wave Funomena II - $100

What is an antinode?

An antinode is the place on a standing wave with maximum constructive interference.


Wave Funomena II - $200

When a water wave passes from deep water to shallow water, it bends in this direction.


Wave Funomena II - $200

What is toward the normal?

Waves travel slower in shallow water. When they Slow down, they bend Toward the normal.

(this is the S.T. in F.A.S.T.)


Wave Funomena II - $300

A 1500 Hz sound wave travels from oil into water. Compared to its wavelength in oil, its wavelength in water is this.


Wave Funomena II - $300

What is shorter?

Water is denser, so the wave speed decreases. Since v=f*λ, and frequency is constant, λ must decrease.


Daily Double

Make your wager, up to your current winnings. You will have 30 seconds to answer.


Daily Double

The fourth harmonic of a standing wave on a string has a wavelength of 20 cm. If the speed of these waves is 8.0 m/s, the frequency of the fundamental is this.


Daily Double

What is 10 Hz?

Fourth Harmonic: n=4

f4=v/λ=(8 m/s)/(0.2 m) = 40 Hz


f4=4f1 so f1=f4/4=(40 Hz)/4 = 10 Hz


Wave Funomena II - $500

The wavelength of light must be much smaller than a millimeter because of this observation.


Wave Funomena II - $500

What is light only diffracting through slits much smaller than a millimeter?

Light does not diffract through 1 mm slits, because the size of the gap is not comparable to the wavelength.


Interfearence - $100

When two troughs of two waves meet, you get this type of interference.


Interfearence - $100

What is constructive interference?

Constructive interference happens any time either two crests or two troughs meet, resulting in a wave of higher amplitude than either of the individual waves alone.


Interfearence- $200

The conditions for complete destructive interference of two waves is this. (2 part answer)


Interfearence - $200

What are 180° out of phase and equal amplitudes?

The waves must be out of phase and have equal amplitudes, or the destructive interference will only be partial.


Interfearence - $300

The name of the nodal line for which the path difference is 2.5 Lambda is this.


Interfearence - $300

What is the 3rdorder minimum (n=2)?

Nodal path difference: PD = (n+0.5)λ

PD = 2.5λ = (n+0.5)λ

n=2, 3rd order minimum.


Interfearence - $400

Plane sound waves of λ = 0.5 m are incident on two narrow slits. At point P is a first order maximum, which is 6 m from the center of the slits and 6 m from the central maximum. The distance between the slits is this.


Interfearence - $400

What is 0.5 m?

λ=0.5 m, D1=6 m, X1=6 m



=0.5 m*6 m/6 m = 0.5 m


Interfearence - $500

If a 2 slit interference pattern from a 532 nm laser has a spacing of 0.8 cm, what is the linear displacement from the central maximum to the 3rd order minimum?


Interfearence - $500

What is 2.0 cm?

∆X=0.8cm. 3rd order minimum is the nodal line n=2, which is 2.5 intervals from the central maximum. 2.5*∆X=2.5*0.8cm = 2.0cm.