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Physics > Waves Sound & Light Grade 10 > Flashcards

Waves Sound & Light Grade 10 Flashcards

1
Q

What is a wave?

A

A wave is a disturbance that transfers energy through space or matter.

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2
Q

What are the two main types of waves?

A

The two main types of waves are mechanical waves and electromagnetic waves.

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3
Q

True or False: Sound is an electromagnetic wave.

A

False: Sound is a mechanical wave.

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4
Q

What is the frequency of a wave?

A

The frequency of a wave is the number of cycles that pass a point in one second.

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5
Q

What unit is frequency measured in?

A

Frequency is measured in hertz (Hz).

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6
Q

What is wavelength?

A

Wavelength is the distance between two consecutive peaks or troughs of a wave.

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7
Q

Fill in the blank: The speed of a wave is equal to its frequency multiplied by its __________.

A

wavelength.

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8
Q

What is the speed of sound in air at room temperature?

A

The speed of sound in air at room temperature is approximately 343 meters per second.

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9
Q

What is amplitude?

A

Amplitude is the maximum displacement of points on a wave from its rest position.

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10
Q

True or False: Higher amplitude means a louder sound.

A

True.

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11
Q

What is the relationship between frequency and pitch in sound?

A

Higher frequency corresponds to a higher pitch.

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12
Q

What is the Doppler Effect?

A

The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

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13
Q

What is refraction?

A

Refraction is the bending of a wave as it passes from one medium to another.

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14
Q

What are electromagnetic waves?

A

Electromagnetic waves are waves that can travel through a vacuum and do not require a medium.

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15
Q

List the electromagnetic spectrum in order from longest wavelength to shortest.

A

Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays.

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16
Q

What is visible light?

A

Visible light is the portion of the electromagnetic spectrum that is visible to the human eye.

17
Q

Fill in the blank: The speed of light in a vacuum is approximately __________.

A

299,792 kilometers per second.

18
Q

What is reflection?

A

Reflection is the bouncing back of a wave when it hits a surface that it cannot pass through.

19
Q

What is a sound wave?

A

A sound wave is a longitudinal wave that is caused by the vibration of particles in a medium.

20
Q

True or False: Light can travel through a vacuum.

A

True.

21
Q

What is constructive interference?

A

Constructive interference occurs when two waves meet and their amplitudes add together.

22
Q

What is destructive interference?

A

Destructive interference occurs when two waves meet and their amplitudes cancel each other out.

23
Q

What is a medium?

A

A medium is the substance through which a wave travels.

24
Q

Fill in the blank: Sound travels fastest in __________.

A

solids.

25
Q

What is the formula for wave speed?

A

Wave speed = frequency x wavelength.

26
Q

What type of wave is light?

A

Light is a transverse wave.

27
Q

What does the term ‘pitch’ refer to?

A

Pitch refers to the perceived frequency of a sound.

28
Q

What is the range of human hearing in hertz?

A

The range of human hearing is approximately 20 Hz to 20,000 Hz.

29
Q

What is an echo?

A

An echo is the reflection of sound that arrives at the listener after a delay.

30
Q

What happens to light when it passes through a prism?

A

Light is refracted and dispersed into its constituent colors.

31
Q

What is the law of reflection?

A

The law of reflection states that the angle of incidence is equal to the angle of reflection.

32
Q

What is a wavefront?

A

A wavefront is an imaginary surface that connects all points of a wave that are in phase.

33
Q

True or False: Sound can travel through a vacuum.

A

False.

34
Q

What is the difference between longitudinal and transverse waves?

A

In longitudinal waves, particles move parallel to the wave direction; in transverse waves, particles move perpendicular to the wave direction.

35
Q

What is the principle of superposition?

A

The principle of superposition states that when two or more waves overlap, the resultant displacement is the sum of the individual displacements.

36
Q

Fill in the blank: The frequency of a wave is inversely related to its __________.

A

wavelength.

37
Q

What is sound intensity?

A

Sound intensity is the power per unit area carried by a sound wave.

38
Q

What is a sonic boom?

A

A sonic boom is the shockwave produced when an object travels through the air at the speed of sound or faster.

Physics (1 decks)

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