Waves

Question 1

Progressive waves

Answer 1

There is a transfer of energy as a result of oscillations

Question 2

Stationary wave

Answer 2

No net transfer of energy. With regions of nodes and antinodes.

Question 3

Mechanical waves

Answer 3

Waves which need a medium through which to travel

Question 4

Time period equation

Answer 4

T=t/n

Question 5

Frequency equation

Answer 5

f=1/T
v=fλ

Question 6

Path and phase difference

Answer 6

Path difference Phase difference
———————— = ————————
λ 2π or 360

Question 7

A wave is polarised if

Answer 7

The oscillations are in one direction only and perpendicular to energy transfer

Question 8

Principle of superposition

Answer 8

When two or more waves meet, the resultant displacement is equal to the vector of the displacements of each wave

Question 9

String equation

Answer 9

1 / T
f1=—— /——
2L _/ μ

Question 10

μ=

Answer 10

Mass per unit length

Question 11

tension=

Answer 11

T

Question 12

Open pipes

Answer 12

-Antinodes at both ends
-open at both ends

Question 13

Closed pipes

Answer 13

-open and closed on either end
-antinode and node on either side
-odd numbered harmonics