# Waves, Light And Sound! Physics Trivia Quiz

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What do you know about waves, light, and sound? A sound wave is regarded as a longitudinal wave, while light waves are transverse waves. A Sound wave can be reflected and refracted just as in soft waves and can give rise to interface phenomena. However, no polarization can be accomplished with sound waves, unlike light waves. If you want to learn more about waves, light, and sound, this is the quiz for you.

• 1.

### All waves except __________ waves must travel through a medium.

• A.

Sound

• B.

Light

• C.

Water

• D.

Compressional

B. Light
Explanation
Light waves are the only type of waves that do not require a medium to travel through. Unlike sound waves, which need a medium such as air, water waves that need a medium such as water, and compressional waves that need a medium to transmit energy, light waves can travel through empty space or a vacuum. This is because light waves are electromagnetic waves that can propagate through the oscillation of electric and magnetic fields, without the need for a physical medium.

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• 2.

### Points A and F on the wave are ________

crest, crests
Explanation
Points A and F on the wave are located at the highest points of the wave, known as crests. A crest is the point on a wave where the displacement of the medium is at a maximum. In this case, since there are two points mentioned (A and F), it indicates that there are multiple crests on the wave, hence the plural form "crests".

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• 3.

### Points D and I on the wave are __________________.

trough, troughs
Explanation
Points D and I on the wave are troughs. In a wave, the trough is the lowest point or the bottom of the wave. It is the point where the displacement of the medium is at its minimum. The wave oscillates up and down from the trough, creating a pattern of peaks and troughs. In this case, both points D and I are identified as troughs, indicating that the wave is at its lowest points at these locations.

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• 4.

### The distance between A and F is the _____________.

• A.

Frequency

• B.

Period

• C.

Amplitude

• D.

Wavelength

D. Wavelength
Explanation
The distance between A and F refers to the wavelength. Wavelength is the distance between two consecutive peaks or troughs of a wave. In this context, it represents the distance between point A and point F on the wave.

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• 5.

### The distance from the dotted line to Point A, or the distance from the dotted line to Point D is known as the ______________.

• A.

Frequency

• B.

Period

• C.

Amplitude

• D.

Wavelength

C. Amplitude
Explanation
The distance from the dotted line to Point A or Point D is known as the amplitude. Amplitude refers to the maximum displacement or distance from the equilibrium position in a wave. In this context, it represents the maximum distance from the dotted line to either Point A or Point D.

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• 6.

### this image shows an example of:

• A.

Reflection

• B.

Refraction

• C.

Penumbra

• D.

A broken straw

B. Refraction
Explanation
The image provided is an example of refraction because it shows the bending of light as it passes from one medium to another. Refraction occurs when light travels through a medium with a different optical density, causing the light rays to change direction. In the image, the straw appears to be bent or broken when it is placed in water, which is a result of the refraction of light.

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• 7.

### In this animation, what type of wave is shown?

• A.

Transverse

• B.

Refracted

• C.

Longitudinal

• D.

Light

C. Longitudinal
Explanation
The animation shown in the question depicts a wave that travels in the same direction as the disturbance it carries. This type of wave is called a longitudinal wave. In a longitudinal wave, the particles of the medium through which the wave is traveling vibrate parallel to the direction of the wave. This is in contrast to a transverse wave, where the particles vibrate perpendicular to the direction of the wave. The term "refracted" refers to the bending of waves as they pass through different mediums, and "light" refers to a specific type of electromagnetic wave.

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• 8.

### The type of wave shown is a __________ wave.

transverse
Explanation
The type of wave shown is a transverse wave. Transverse waves are characterized by the perpendicular motion of particles to the direction of wave propagation. In these waves, the particles move up and down or side to side, creating crests and troughs. Examples of transverse waves include light waves and waves on a string.

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• 9.

### What property of waves is shown in the animation?

refraction, refracting
Explanation
The animation demonstrates the property of refraction or refracting waves. Refraction occurs when a wave changes direction as it moves from one medium to another, due to the change in its speed. This change in direction is caused by the wave bending as it enters a different medium with a different density or refractive index. The animation likely depicts the bending of waves as they pass through different materials, showcasing the property of refraction.

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• 10.

### Which of the following waves transfer energy?

• A.

Sound

• B.

Light

• C.

Sea waves

• D.

Microwaves

• E.

All of the above

E. All of the above
Explanation
All of the options listed - sound, light, sea waves, and microwaves - are types of waves that transfer energy. Sound waves are mechanical waves that transfer energy through vibrations in a medium, such as air or water. Light waves are electromagnetic waves that transfer energy through the electromagnetic spectrum. Sea waves, also known as ocean waves, transfer energy through the movement of water particles. Microwaves are a type of electromagnetic wave that transfers energy and is commonly used in communication and cooking. Therefore, all of the options listed transfer energy.

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• 11.

### The wave speed equation is s = frequency x wavelength. If the speed of the wave is 400 m/s  and the wavelength is 2m, what is its frequency?

• A.

200 Hz

• B.

800 Hz

• C.

200 m/s

• D.

400 Hz

A. 200 Hz
Explanation
The wave speed equation states that the speed of a wave is equal to the product of its frequency and wavelength. In this question, the given wave speed is 400 m/s and the wavelength is 2m. To find the frequency, we can rearrange the equation to solve for frequency. Dividing both sides of the equation by the wavelength, we get frequency = wave speed / wavelength. Plugging in the given values, we have frequency = 400 m/s / 2m = 200 Hz. Therefore, the correct answer is 200 Hz.

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• 12.

### What do waves P and Q have in common?

• A.

Same Period

• B.

Same Frequency

• C.

Same Amplitude

• D.

All of the above

B. Same Frequency
Explanation
The waves P and Q have the same frequency. This means that they have the same number of oscillations or cycles per unit of time. Frequency is a characteristic of a wave that determines its pitch in sound waves or its color in light waves. Therefore, waves P and Q have the same pitch or color, indicating that they have the same frequency.

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• 13.

### Which wave has the lowest amplitude?

• A.

P

• B.

S

• C.

Q

• D.

R

D. R
Explanation
The wave with the lowest amplitude is R. Amplitude refers to the maximum displacement of particles in a medium from their equilibrium position. In this case, wave R has the lowest maximum displacement, indicating the lowest amplitude compared to waves P, S, and Q.

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• 14.

### Which wave has changing frequency?

• A.

S

• B.

Q

• C.

R

• D.

P

A. S
Explanation
The wave that has changing frequency is wave S. This can be inferred from the given options where S is the only wave mentioned. Since frequency refers to the number of complete cycles of a wave that occur in a unit of time, a changing frequency indicates that the number of cycles per unit of time is not constant.

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• 15.

### A wave has a period of 10s and a wavelength of 2m. What is its speed? write the answer with the proper unit (Do not use space in your answer)

0.2m/s
Explanation
The speed of a wave can be calculated by dividing the wavelength by the period. In this case, the wavelength is given as 2m and the period is given as 10s. Dividing the wavelength by the period gives us a speed of 0.2m/s.

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• 16.

### Name the region labeled with I:

• A.

Compression

• B.

Rarefaction

• C.

Wavelength

• D.

Frequency

B. Rarefaction
Explanation
The region labeled with I is called "Rarefaction". In a sound wave, rarefaction refers to the part of the wave where the particles are spread apart, resulting in a decrease in pressure and density. It is the opposite of compression, which is the region where the particles are close together, causing an increase in pressure and density. By identifying the labeled region as rarefaction, we can understand the specific part of the wave where the particles are less dense and the pressure is lower.

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• 17.

### Name the region labeled with H:

• A.

Compression

• B.

Rarefaction

• C.

Wavelength

• D.

Frequency

A. Compression
Explanation
The region labeled with H is the compression. In a wave, compression refers to the region where the particles are closely packed together, resulting in a high pressure area. This occurs in longitudinal waves, such as sound waves, where the particles vibrate back and forth in the same direction as the wave propagation. In the compression region, the particles are pushed closer together, causing an increase in density and pressure.

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• 18.

### Name the region labeled with G:

• A.

Compression

• B.

Rarefaction

• C.

Wavelength

• D.

Frequency

C. Wavelength
Explanation
In this question, the options provided are related to sound waves. Compression and rarefaction refer to the areas of high and low pressure in a sound wave respectively. Frequency refers to the number of waves produced per second, while wavelength refers to the distance between two consecutive points in a wave. The region labeled with G in this context would be the wavelength, as it represents the distance between two consecutive points of compression or rarefaction.

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• 19.

### What type of wave vibrates parallel to the direction of travel?

longitudinal, longitudinal wave
Explanation
A longitudinal wave is a type of wave where the particles of the medium vibrate parallel to the direction of wave travel. In this type of wave, the disturbance or energy is transferred through compressions and rarefactions in the medium. The term "longitudinal wave" is used to describe this specific characteristic of the wave, where the particles move back and forth in the same direction as the wave is traveling. Therefore, the correct answer to the question is "longitudinal, longitudinal wave."

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• 20.

### In what type of wave is the vibration perpendicular to the direction of travel of the wave?

Transverse, Transverse Wave
Explanation
A transverse wave is a type of wave in which the vibration of the particles or medium is perpendicular to the direction of travel of the wave. In other words, the particles move up and down or side to side while the wave moves forward. This is different from a longitudinal wave, where the vibration is parallel to the direction of travel. Therefore, the correct answer is transverse wave.

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• 21.

### What type of wave contains compression and rarefaction?

Sound, Longitudinal, Longitudinal wave
Explanation
Sound waves are longitudinal waves, meaning that they travel through a medium by causing particles in the medium to vibrate back and forth in the same direction as the wave is moving. This vibration creates areas of compression, where particles are close together, and rarefaction, where particles are spread out. Therefore, sound waves contain compression and rarefaction.

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• 22.

### What is the phenomena when a wave, like light, bounces off an object.

reflection
Explanation
Reflection is the phenomenon that occurs when a wave, such as light, bounces off an object. This is due to the wave encountering a surface and changing direction, returning back into the medium it came from. Reflection is a fundamental property of waves and is responsible for our ability to see objects that do not emit light directly.

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