Waves

Question 1

Light

Answer 1

form of energy that travels by electromagnetic waves

Question 2

Reflection

Answer 2

the way in which light bounces off surfaces

Question 3

angle of incidence

Answer 3

angle between the normal and the incident ray

Question 4

angle of reflection

Answer 4

angle between the normal and reflected ray

Question 5

Parallax

Answer 5

relative movement of two objects due to the movement of the observer

Question 6

Laws of reflection

Answer 6

1. The incident ray,normal and reflected ray are all in the same plane
2. The angle of reflection is equal to angle of incidence

Question 7

real image

Answer 7

actual intersection of light rays

Question 8

virtual image

Answer 8

apparent intersection of light rays

Question 9

Waves

Answer 9

A wave is a disturbance that carries energy from one place to another

Question 10

Transverse Waves

Answer 10

Transverse waves are waves in which the direction of vibration is perpendicular to the propogation of the wave

Question 11

Longitudinal Waves

Answer 11

Longitudinal waves are waves in which the direction of vibration is parallel to the propogation of the wave

Question 12

Mechanical Waves

Answer 12

Mechanical waves are the vibration of particles

Question 13

Electromagnetic Waves

Answer 13

Electromagnetic waves are the disturbance of electric and magnetic fields

Question 14

Wavelength(λ)

Answer 14

Wavelength(λ) is the distance from a point on a wave to the corresponding point on an adjacent wave

Question 15

Frequency(f)

Answer 15

Frequency(f) is the number of waves passing a point per second

Question 16

Amplitude(A)

Answer 16

Amplitude(A) is the maximum distance from the undisturbed position

Question 17

Velocity of a wave(c)

Answer 17

The velocity of a wave is the product of wavelength and frequency(c=fλ)

Question 18

Reflection

Answer 18

Reflection is when a wave bounces off an object in it’s path

Question 19

Refraction

Answer 19

Refraction is the changing of direction of a wave when it goes from one medium to another

Question 20

Diffraction

Answer 20

Diffraction is the spreading out of a wave into the space beyond a barrier

Question 21

Interference

Answer 21

Interference is the addition of two or more waves,forming a single resultant wave

Question 22

Constructive Interference

Answer 22

Constructive interference is when two or more waves combine,forming a single wave of greater amplitude than the source waves

Question 23

Coherent wave sources

Answer 23

Wave sources are coherent when they produce waves of the same frequency that are either in phase or a constant phase difference apart

Question 24

Waves in phase

Answer 24

Waves are in phase when the crests from one source meets crests from another

Question 25

Destructive Interference

Answer 25

Destructive Interference is when two or more waves combine,resulting in a single wave of lower amplitude than the source waves

Question 26

Waves out of phase

Answer 26

Waves are out of phase when the crests from one source meet the troughs from another

Question 27

Polarisation

Answer 27

Polarisation is when the dov of a wave is limited to one plane

Question 28

Doppler Effect

Answer 28

The Doppler Effect is the apparent change in frequency of waves due to the relative motion between a wave source and observer