Light & Sound Flashcards
What is a transverse wave?
It’s usually described by the particle motion being perpendicular to wave motion.
Or
Take a Slinky and move it left and right.
What is a longitudinal Wave?
It’s a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
Or
Take a slinky and push it forwards and back
What is the angle of reflection equal to?
The angle of Refraction
What’s the amplitude?
It goes from the middle line to the peek(highest part) or from the middle line to the trough(lowest part)
Why does light refract?
When light goes from a less dense to a more dense object (air to glass block) it slows down & bends.
Why does white light split into the rainbow colours?
The colour of light depends on its wavelength
White is made up off all colours because it contains all the wave lengths.
What colours is white composed of?
Red Orange Yellow Green Blue Indigo Violet
How do we know that lines travel in a straight lines?
Shadows can be used as proof that lines travel in a straight line.
A shadow is formed when light is blocked by a object.
If light could bend in curves then there would be no shadows.
What type of wave is sound?
Longitudinal
Can sound travel through space?
No
What are reflected sounds called?
Echos
What is the range of human hearing?
20Hz to 20000Hz
