Waves

Question 1

Transverse waves

Answer 1

Wave in which the direction of disturbance is perpendicular to the direction in which the transverse wave travels

Question 2

Amplitude

Answer 2

Maximum displacement of the particles of a medium from their rest positon

Question 3

Wavelength

Answer 3

The distance between two consecutive points that are in phase

Question 4

Period

Answer 4

The time taken for one complete wave to pass a point

Question 5

Frequency

Answer 5

Number of waves that pass a point in one second

Question 6

Period equation

Answer 6

T = 1 / frequency

Question 7

Frequency equation

Answer 7

frequency = 1 / period

Question 8

Waves are in phase with each other

Answer 8

Particles in the medium are moving in exactly the same direction with exactly the same speed as each other at the same time

Question 9

Pulse

Answer 9

Single disturbance in a medium

Question 10

Amplitude of pulse

Answer 10

The maximum displacement of the particles of the medium from their rest position

Question 11

Transverse pulse

Answer 11

Pulse in which the direction of disturbance is perpendicular to the direction in which the transverse pulse travels

Question 12

Principle of superposition

Answer 12

The amplitude of the resultant pulse at any point is the algebraic sum of the amplitudes of the individual pulses at that point

Question 13

Constructive interference

Answer 13

Two or more pulses meet, resulting in a larger pulse being formed

Question 14

Destructive interference

Answer 14

Two or more pulses meet, one amplitude is a negative number, therefore resulting in a smaller pulse being formed.

Question 15

Longitudinal wave

Answer 15

Wave in which the direction of disturbance is parallel to the direction in which the longitudinal wave travels

Question 16

Echo

Answer 16

The repetition of a sound when the original sound reflects off a hard surface

Question 17

Equation to figure out depth

Answer 17

Velocity = distance / time

Question 18

Electromagnetic waves

Answer 18

Transverse waves that do not need a medium in order to travel and travel at the speed of light (300 000 000m/s)

Question 19

Dual nature of light

Answer 19

Electromagnetic waves can behave like both waves and like particles depending on the circumstances

Question 20

Dual nature of light - wave nature

Answer 20

Exhibit properties such as interference and diffraction. Evidence is the double slit experiment

Question 21

Dual nature of light - particle nature

Answer 21

Particle nature of electromagnetic waves refers to the idea that they can also behave as photons

Question 22

Photons

Answer 22

Packets of energy that transfer energy to particles of matter

Question 23

Equations for photons #1

Answer 23

Energy (J) = Plank’s constant x frequency (Hz)

Question 24

Energy of photon #2

Answer 24

Energy = (planks constant x speed of light) / wavelength