C - Waves - Properties of Waves Flashcards
What type of wave is this?
Transverse
What type of wave is this?
Longitudinal
A sound wave has a frequency of 1000Hz. Calculate the period of one wave.
T = 1/f
T = 1/1000
T = 0.001 s
A water wave has a period of 5s. Calculate the frequency of the waves.
f = 1/T
f = 1/5
f = 0.2Hz
Calculate the period of a wave with frequency 200Hz.
Calculate the period of a wave with frequency 200Hz.
T = 1/f
T = 1/200
T = 0.005 s
Calculate the frequency of a wave with a period of 0.02s.
f = 1/T
f = 1/0.02
f = 50Hz
A sound wave has a frequency of 4000Hz and a wavelength of 8.5 cm. Calculate its speed.
v = fλ
v = 4000 x 8.5cm
v = 4000 x 0.085 m
= 340 ms-1
Calculate the frequency of a radio signal with wavelength 250 m.
v = fλ
f = v/λ
All electromagnetic waves travel at the same speed of 3 x 108 m/s.
f = 3 x 108/250
f = 3 x 108/2.5 x102
f = 3 x 108-2/2.5
f = 3 x 106/2.5
f = 1.2 x 106 Hz
Calculate the frequency of a sound wave of wavelength 10cm travelling at 330 ms-1
v = fλ
f = v/λ
f = 330/10cm
f = 330/0.1
f = 3300Hz
Calculate the wavelength of red light which has a frequency of 4.6 x 10 ^14 Hz.
v = fλ
λ = v/f
λ = 3 x 10 ^8/4.6 x 10 ^14
λ = 3 x 10 ^(8-14)/4.6
λ = 3 x 10 ^-6/4.6
λ = 0.652 x 10 ^-6
λ = 6.52 x 10 ^-7m
Calculate the frequency of violet light which has a wavelength of 450nm
v = fλ
f = v/λ
f = 3 x 10 ^8/450nm
f = 3 x 10 ^8/450 x 10^-9
f = 3 x 10 ^8/4.5 x 10^-7
f = 3 x 10 ^8-(-7)/4.5
f = 3 x 10 ^15/4.5
f = 0.667 x 10^15
f = 6.67 x 10^14Hz
Name the parts of the wave
A - Crest
B - Amplitude
C - Wavelength
D - Trough
The number of waves that pass a point every second is called it’s __________________.
frequency
The time it takes one wave to pass a point is called a _________.
period
Describe diffraction.
Diffraction is when waves bend around obstructions, edges or through gaps.
