Waves Flashcards
True or false?
Light travels in a straight line.
True
Describe refraction.
It is when the direction of light changes at the surface between two materials
Describe how our eyes work.
Our eyes see the upside down because the lines of light flip over each other. But our brain are clever enough to flip them the right way up.
True or false?
You time the angle of incidence by 1.5 to get the angle of reflection.
False.
Both angles are alway exactly the same.
What is a diffuse reflection?
Where the surface of an object is not smooth so when the light hits it, it bounces off at different angles.
What is a specular reelection?
Where the surface of the object is smooth so when the light hits it, it bounces off ,all at the same angle, so you can see your reflection.
True or false?
Vibrating objects make no noise.
False.
All vibrating objects make noise. That is how sound waves are formed.
Does sound reflect in the same way as light?
Yes
Can sound travel without some form of material to travel through?
No. Sound must have a medium to travel through.
Define amplitude.
Amplitude is the distance between peaks/ troughs and the equilibrium.
Define pitch
Pitch is the frequency of peaks
Define frequency
It is the number of waves per second
What is the unit for frequency?
Hertz
What is a transverse wave?
A wave that vibrates perpendicular to the direction of the travel of the wave.
What is a longitudinal wave?
A wave that has vibrations parallel to the direction of travel of the wave.
