Physics revision Flashcards
Define wave.
A wave transfers energy without transferring matter
In which type of wave does the energy move at right angles to the particle movement?
transverse waves
Give one example of a longitudinal wave.
sound
What is the formula when solving the frequency of a wave?
F = V/λ
What is the formula when solving the wavelength of a wave?
λ = V/F
What is the formula when solving the velocity of a wave?
V = F x λ
Explain how a triangle makes a sound when struck.
- When hitting the triangle, the air particles next to it vibrate.
- The particles are getting further apart.
- The sound energy is transferred as these particles cause the particles next to them to vibrate.
- hence the ear can hear the sound.
Write conclusions on what will determine loudness and pitch of the sound.
The larger the amplitude, the louder the sound
The higher the frequency (the shorter the wavelength), the higher the pitch
What wave does light travel in?
Transverse
What does light travel as?
An electromagnetic wave
Does light require medium to travel through?
It does not require medium, so it can travel through a vacuum
Light travels in straight lines
true or false?
true
Different _________ of light are observed as different colors.
Spectrum
What light is made of all colours combined?
White light
A prism splits white light in a process called…
Dispersion
The colours can be remembered by the acronym…
ROYGBIV
Dispersion occurs because different colours of light refract differently.
What colour light refracts the least; what colour light the most?
Red the least; violet the most
What is the unit of wavelengths?
Metres
Concave lens refracts the light rays and ____ them. What is the blank spot?
diverge
Convex lens refracts the light rays and ____ them. What is the blank spot?
Converges
Define period
the time taken for one complete wave.
Give one example of a transverse wave
Light waves
Define frequency
the number of waves that pass a single point per second.
For the same wave length- larger amplitudes and the color will be observed as?
brighter light (more intense)
