Waves

Question 1

Define wave.

Answer 1

A disturbance that transfers energy through matter or space.

Question 2

What is the wavelength of a wave?

Answer 2

The distance between consecutive crests or troughs.

Question 3

True or false: Transverse waves oscillate perpendicular to the direction of travel.

Answer 3

TRUE

Question 4

Fill in the blank: Longitudinal waves consist of ______ and rarefactions.

Answer 4

compressions

Question 5

What is the frequency of a wave?

Answer 5

The number of complete waves passing a point per second.

Question 6

Define amplitude.

Answer 6

The maximum displacement of points on a wave from its rest position.

Question 7

What is the speed of a wave?

Answer 7

The distance traveled by a wave per unit time.

Question 8

True or false: Sound waves are an example of transverse waves.

Answer 8

FALSE

Sound waves are longitudinal waves.

Question 9

Fill in the blank: The period of a wave is the time taken for one ______.

Answer 9

complete cycle

Question 10

What is refraction?

Answer 10

The bending of a wave as it enters a different medium.

Question 11

Define diffraction.

Answer 11

The spreading of waves when they pass through an opening or around obstacles.

Question 12

What is interference?

Answer 12

The phenomenon that occurs when two waves meet and combine.

Question 13

True or false: Constructive interference occurs when waves are out of phase.

Answer 13

FALSE

Constructive interference occurs when waves are in phase.

Question 14

Fill in the blank: The Doppler effect describes the change in ______ of a wave due to relative motion.

Answer 14

frequency

Question 15

What is standing wave?

Answer 15

A wave that remains in a constant position, formed by the interference of two waves traveling in opposite directions.

Question 16

Define node in a standing wave.

Answer 16

A point where the wave has zero amplitude.

Question 17

What is a trough?

Answer 17

The lowest point of a wave.

Question 18

True or false: Seismic waves are a type of electromagnetic wave.

Answer 18

FALSE

Seismic waves are mechanical waves.

Question 19

Fill in the blank: Electromagnetic waves can travel through ______.

Answer 19

a vacuum

Question 20

What is polarization?

Answer 20

The orientation of the oscillations of a wave in a particular direction.

Question 21

Define wavefront.

Answer 21

An imaginary surface representing points of a wave that are in phase.

Question 22

What is reflection?

Answer 22

The bouncing back of a wave when it hits a barrier.

Question 23

True or false: Sound travels faster in air than in water.

Answer 23

FALSE

Sound travels faster in water than in air.

Question 24

Fill in the blank: The law of reflection states that the angle of incidence equals the angle of ______.

Answer 24

reflection

Question 25

What is **resonance**?

Answer 25

The phenomenon that occurs when a system is driven at its natural frequency.

Question 26

Define **wave energy**.

Answer 26

The energy carried by a wave, proportional to its amplitude and frequency.

Question 27

What is **sound intensity**?

Answer 27

The power per unit area carried by a sound wave.

Question 28

True or false: **Higher frequency** waves carry more energy than lower frequency waves.

Answer 28

TRUE

Question 29

Fill in the blank: The **speed of sound** in air is approximately ______ m/s at room temperature.

Answer 29

343

Question 30

What is **wave-particle duality**?

Answer 30

The concept that waves exhibit both wave-like and particle-like properties.

Question 31

Define **medium** in the context of waves.

Answer 31

The substance through which a wave travels.

Question 32

What is a **sine wave**?

Answer 32

A mathematical curve that describes a smooth repetitive oscillation.

Question 33

True or false: **All waves require a medium to travel**.

Answer 33

FALSE ## Footnote Electromagnetic waves do not require a medium.

Question 34

Fill in the blank: **Mechanical waves** require a ______ to propagate.

Answer 34

medium

Question 35

What is **wave superposition**?

Answer 35

The principle that states two or more waves can overlap and combine.

Question 36

Define **acoustic wave**.

Answer 36

A type of mechanical wave that propagates through a medium due to pressure variations.

Question 37

What is **wave frequency** measured in?

Answer 37

Hertz (Hz), which is cycles per second.

Question 38

True or false: **Wave speed** is affected by the medium through which it travels.

Answer 38

TRUE

Question 39

Fill in the blank: The **principle of superposition** states that the resultant wave is the ______ of the individual waves.

Answer 39

sum