Describing waves
2 marks · EasyA teacher produces waves on a stretched spring. The frequency is 2 Hz and the time period is 0.5 seconds.
(a)[1 mark]
State the equation that links frequency and time period.
(b)[1 mark]
Show, using the values above, that the relationship between frequency and time period is correct.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) or
(b) When , , so the relationship holds.
Common mistakes: Multiplying instead of dividing
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correctly gives equation or .
B1 (b) · 1 mark · Shows calculation: 1 / 0.5 = 2, matches frequency given.
Worked solution
a) The equation is .
b) Using the values: , which matches the frequency given.