xavier catholic college physics the world communicates

XAVIER CATHOLIC COLLEGE

PHYSICS

THE WORLD COMMUNICATES

Worksheet 3: Students : 1.5a solve problems and analyse information by applying the mathematical model of v=fλ to a range of situations Remember: T =

1 f

or

f =

1 T

Question 1 Sound travels through air at about 330 ms-1. Calculate the wavelength of a sound of frequency 256 € Hz.

Question 2 The “C” above middle C on the piano has a frequency of 512 Hz. Calculate its wavelength.

W3-1.5a-v=fxlambda.doc

Page 1 of 5

Question 3 The speed of light is 3 x 108 ms-1. Violet light has a wavelength of about 400 nm (nm = x 10-9). Calculate the frequency of this light.

Question 4 The table below shows information about the various colours of visible light. Calculate the missing data. Colour

Frequency (Hz)

Wavelength (nm)

red

750

orange

600

yellow

580

green

540

blue

6 x 1014

indigo

6.67 x 1014

W3-1.5a-v=fxlambda.doc

Page 2 of 5

Question 5 A single dipper creates waves in a ripple tank. The waves are seen to have a distance of 5.0 cm between the crests. Twelve crests are observed to hit the side of the tank in 4.0 s. Calculate the following for the waves: a) the wavelength

b) the frequency

c) the period

d) the speed

W3-1.5a-v=fxlambda.doc

Page 3 of 5

Question 6 Each wave below has been drawn life size. Each represents 1.0 s of time. For each find its wavelength, amplitude, frequency, period and velocity.

(Shadwick; 2004: 6)

A.

B.

W3-1.5a-v=fxlambda.doc

Page 4 of 5

C.

D.

E.

END OF WORKSHEET ACKNOWLEDGEMENTS Boyle, D. Allan, P. & Millar, G. (1993) A Question Of Physics. Port Melbourne, Rigby Heinemann Shadwick, B. (2004) Surfing Physics The World Communicates . Marrickville, Science Press

W3-1.5a-v=fxlambda.doc

Page 5 of 5