# Trivia Quiz: What Do Know About Frequencies And Wavelengths?

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What Do Know About Frequencies And Wavelengths? A wavelength is the distance between two waves whereas the frequency is the number of waves that pass a given point at a time. In the quiz below, we shall dig deeper into the relationship between the two and how they are measured. How about you give it a shot and refresh your memory?

• 1.

### A long wavelength means:

• A.

Low frequency

• B.

High frequency

A. Low frequency
Explanation
A long wavelength refers to the distance between two consecutive points on a wave. When the wavelength is long, it means that there is a greater distance between these points. In the context of frequency, a longer wavelength corresponds to a lower frequency. This is because frequency is inversely proportional to wavelength - as the wavelength increases, the frequency decreases. Therefore, a long wavelength indicates a low frequency.

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• 2.

### If the amplitude is high, the sound is:

• A.

Louder

• B.

Quieter

A. Louder
Explanation
If the amplitude of a sound wave is high, it means that the wave is more intense and has a greater magnitude. This results in a louder sound because the higher amplitude causes more air particles to vibrate, creating a stronger pressure wave that reaches our ears with more energy. Therefore, a high amplitude corresponds to a louder sound.

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• 3.

### This wave represents a sound that is:

• A.

Low-pitched

• B.

High-pitched

• C.

There is no way to tell.

B. High-pitched
Explanation
The wave represents a high-pitched sound because high-pitched sounds are characterized by waves with a higher frequency. The wave in the given question appears to have a higher frequency, which corresponds to a high-pitched sound.

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• 4.

### Which of these waves has the lowest frequency?

• A.

Red

• B.

Orange

• C.

Green

• D.

Blue

• E.

Purple

A. Red
Explanation
Red has the lowest frequency among these waves. Frequency refers to the number of waves that pass a given point in a certain amount of time. The color red has the longest wavelength and therefore the lowest frequency among visible light waves.

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• 5.

### The symbol λ stands for:

• A.

Frequency

• B.

Wavelength

• C.

Amplitude

B. Wavelength
Explanation
The symbol λ is commonly used to represent wavelength in physics. Wavelength refers to the distance between two consecutive points in a wave that are in phase with each other, such as two crests or two troughs. It is an important parameter in the study of waves and is often used to calculate various wave properties, such as frequency and wave speed.

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• 6.

### What is a unit used to measure frequency?

• A.

Meters

• B.

Cycles/second

• C.

Meters/second

• D.

Waves/second

B. Cycles/second
D. Waves/second
Explanation
The correct answer is cycles/second, also known as hertz (Hz). Frequency is a measure of how many cycles or waves occur in a given time period. It represents the number of complete oscillations or vibrations of a wave per second. Meters, meters/second, and waves/second are not units used to measure frequency.

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• 7.

### If the amplitude is low, the light is:

• A.

Brighter

• B.

Dimmer

B. Dimmer
Explanation
When the amplitude of light is low, it means that the intensity of the light is also low. This results in a dimmer appearance as there is less light energy being emitted or reflected. Therefore, the correct answer is "Dimmer".

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• 8.

### Microwaves have a higher frequency than X-Rays. True or False?

• A.

True

• B.

False

B. False
Explanation
This statement is false. X-rays have a higher frequency than microwaves. X-rays are a form of electromagnetic radiation with a higher frequency and shorter wavelength than microwaves. Microwaves, on the other hand, have a lower frequency and longer wavelength compared to X-rays.

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• 9.

### In which situation does sound travel fastest?

• A.

High density medium (like solids)

• B.

Medium density medium (like liquids)

• C.

Low density medium (like gases)

• D.

No medium

A. High density medium (like solids)
Explanation
Sound travels fastest in high density mediums like solids because the particles in solids are closely packed together, allowing sound waves to propagate more quickly through them. In liquids and gases, the particles are more spread out, resulting in slower sound transmission. In a vacuum or no medium, sound cannot travel at all as there are no particles to transmit the vibrations.

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• 10.

### In which situation does light travel fastest?

• A.

Low density medium (like gases)

• B.

Medium density medium (like liquids)

• C.

High density medium (like solids)

• D.

No medium

D. No medium
Explanation
Light travels fastest in a vacuum or when there is no medium present. In a vacuum, there are no particles to interact with or slow down the light waves. When light enters a medium, such as gases, liquids, or solids, it interacts with the atoms or molecules of the medium, causing it to slow down. Therefore, in the absence of any medium, light can travel at its maximum speed.

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• 11.

### Sound travels faster than light. True or False?

• A.

True

• B.

False

B. False
Explanation
This statement is false. In reality, sound travels much slower than light. The speed of sound depends on the medium through which it travels, while the speed of light is constant in a vacuum. In air, sound travels at approximately 343 meters per second, while light travels at around 299,792 kilometers per second. Therefore, light is significantly faster than sound.

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• 12.

### Which is a CORRECT formula relating to wavelength, frequency, and speed of waves?

• A.

V = λ➗⨏

• B.

λ = v●⨏

• C.

λ = v➗⨏

• D.

⨏ = λ●v

C. λ = v➗⨏
Explanation
The correct formula relating to wavelength, frequency, and speed of waves is λ = v/⨏. This formula represents the relationship between wavelength (λ), speed of the wave (v), and frequency (⨏). It states that the wavelength is equal to the speed of the wave divided by the frequency.

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• 13.

### Which electromagnetic energy is most dangerous and why?

• A.

Gamma Waves -> Lowest frequency

• B.

Infrared -> Highest frequency

• C.

Gamma waves -> Highest frequency

• D.

X-rays -> Highest energy

C. Gamma waves -> Highest frequency
Explanation
Gamma waves have the highest frequency among the given options. Frequency is directly proportional to the energy of electromagnetic waves. Therefore, gamma waves have the highest energy. Higher energy waves can cause more damage to living organisms, making gamma waves the most dangerous form of electromagnetic energy.

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• 14.

### Blue light has more energy than orange light. True or False?

• A.

True

• B.

False

A. True
Explanation
Blue light has a shorter wavelength and higher frequency than orange light. According to the wave-particle duality of light, higher frequency corresponds to higher energy. Therefore, blue light indeed has more energy than orange light.

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