Waves

Question 1

1st Harmonic

Answer 1

Lowest f at which Stat. Wave is formed

Question 2

Coherence

Answer 2

Sources that emit waves with same f and constant Phase difference

Question 3

Absolute n

Answer 3

Ratio speed of wave through vacuum / Speed of wave through medium

Question 4

Relative n

Answer 4

Ratio speed wave in 1 medium / speed of wave in another

Question 5

Phase

Answer 5

2 points on wave oscillate with same v + s at same t

Question 6

Antiphase

Answer 6

2 points on wave oscillate equal but opposite v and s at same t

Question 7

Phase Difference

Answer 7

Fraction of cycle between vibrations of 2 particles

Question 8

Refraction

Answer 8

Wave changes direction as it moves from one medium to another with different density

Question 9

=

Answer 9

=

Question 10

Diffraction

Answer 10

Wave moves through gap. If wavelength = Gap size, wave tends to spread in ALL directions.

Question 11

Transverse

Answer 11

can be polarised. perp

Question 12

Longitudinal

Answer 12

no polarised. Parallel

Question 13

Resonant F

Answer 13

occur when distance between 2 fixed ends is an intenger multiple of half wavelengths.

Question 14

ProgrEssive waves PRONOMAT

Answer 14

transfer energfy from one place to another, without transferring any of the matter they are travelling through

Question 15

Absorption

Answer 15

Loses energy, reduces A, Loss of info

Question 16

Constructive Interference

Answer 16

when crests of 2 waves coincide, combine to create amplified wave

Question 17

Internal Reflection

Answer 17

Light speeds up when enetering less optically dense medium

Question 18

TIR

Answer 18

Ai = CA, light travel along boundary of two mediums. Ai > CA, all light reflected.

Question 19

Superposition

Answer 19

Occurs when 2 waves of same type meet

Question 20

Monochromatic

Answer 20

Light of equal wavelength