Topic 1 - Waves Flashcards
What do waves always carry?
Energy
What do waves sometimes carry?
Information
What are waves made through?
Vibrations
Name 2 types of waves.
- Transverse
- Longitudinal
What is the top of a wave on a diagram called?
A peak or a crest
What is the bottom of a wave on a diagram called?
A trough
What is the name of the length from 1 peak to the next?
A wavelength
What is a mechanical wave?
A wave which requires matter to work and can’t exist without matter.
What is a transverse wave?
A wave that the VIBRATIONS of the wave are PERPENDICULAR to the direction that the wave travels.
Name 3 examples of transverse waves.
Water waves
Secondary earthquake waves
All 7 regions of the E.M spectrum
What is a longitudinal wave?
A wave that the VIBRATIONS are PARALLEL to the direction that the waves travel
Name 3 examples of longitudinal waves.
Sound
Ultrasound
Primary earthquake
What is the equation for wave speed?
Speed = Frequency x Wavelength V = F x /,
Waves are rippling across a pond. The frequency of the waves is 0.2Hz and the wavelength is 0.15m. What is the wave speed?
WIK: F = 0.2Hz. /, = 0.15m. V = ?
V = f x /,
V = 0.2 x 0.15 = 0.03m/s
A wave has a speed of 4m/s and a wavelength of 3m. What is it’s frequency?
WIK: V = 4m/s. F = 25Hz. /, = ?
V = F x /,
F = V / /,
F = 4/3 = 1.33Hz
