Waves Sound & Light Grade 10

Question 1

What is a wave?

Answer 1

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

Question 2

What are the two main types of waves?

Answer 2

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

Question 3

True or False: Sound is an electromagnetic wave.

Answer 3

False: Sound is a mechanical wave.

Question 4

What is the frequency of a wave?

Answer 4

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

Question 5

What unit is frequency measured in?

Answer 5

Frequency is measured in hertz (Hz).

Question 6

What is wavelength?

Answer 6

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

Question 7

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

Answer 7

wavelength.

Question 8

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

Answer 8

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

Question 9

What is amplitude?

Answer 9

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

Question 10

True or False: Higher amplitude means a louder sound.

Answer 10

True.

Question 11

What is the relationship between frequency and pitch in sound?

Answer 11

Higher frequency corresponds to a higher pitch.

Question 12

What is the Doppler Effect?

Answer 12

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

Question 13

What is refraction?

Answer 13

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

Question 14

What are electromagnetic waves?

Answer 14

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

Question 15

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

Answer 15

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

Question 16

What is visible light?

Answer 16

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

Question 17

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

Answer 17

299,792 kilometers per second.

Question 18

What is reflection?

Answer 18

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

Question 19

What is a sound wave?

Answer 19

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

Question 20

True or False: Light can travel through a vacuum.

Answer 20

True.

Question 21

What is constructive interference?

Answer 21

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

Question 22

What is destructive interference?

Answer 22

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

Question 23

What is a medium?

Answer 23

A medium is the substance through which a wave travels.

Question 24

Fill in the blank: Sound travels fastest in __________.

Answer 24

solids.

Question 25

What is the formula for wave speed?

Answer 25

Wave speed = frequency x wavelength.

Question 26

What type of wave is light?

Answer 26

Light is a transverse wave.

Question 27

What does the term 'pitch' refer to?

Answer 27

Pitch refers to the perceived frequency of a sound.

Question 28

What is the range of human hearing in hertz?

Answer 28

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

Question 29

What is an echo?

Answer 29

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

Question 30

What happens to light when it passes through a prism?

Answer 30

Light is refracted and dispersed into its constituent colors.

Question 31

What is the law of reflection?

Answer 31

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

Question 32

What is a wavefront?

Answer 32

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

Question 33

True or False: Sound can travel through a vacuum.

Answer 33

False.

Question 34

What is the difference between longitudinal and transverse waves?

Answer 34

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

Question 35

What is the principle of superposition?

Answer 35

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

Question 36

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

Answer 36

wavelength.

Question 37

What is sound intensity?

Answer 37

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

Question 38

What is a sonic boom?

Answer 38

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