Sound And Light Flashcards
Plane Mirror
A Mirror that is perfectly flat.
Refraction
When light rays slow down when they travel through a different medium. As a result of this, the light bends. E.g Air to water.
Cornea
It reflects light onto the Retina and protects it.
Oscillation
This transfers energy or information about waves.
Speed of Sound
The Seed of sound travels quicker through solids, than liquids and gases.
Solids:5,000 m/s
Liquids:1,500 m/s
Gases: 340 m/s
Specular Refection
A Refection off a smooth surface.
Lens
There a Convex and Concave. A Convex lens is the type of lens that reflects light to the Retina. E.g If you are Short-Sighted you will need Concave lensed glasses to help fix it.
Pitch
How high or low a sound is.
Audible Range
20Hz-20,000Hz (20kHz)
Diffuse Scattering
A Reflection off a rough surface.
Retina
The Retina is at the back of you eye. It flips the image you are seeing back over so it is the right way round. It then send this image to the brain.
Amplitude
The distance between the bottom and top of a Transverse Wave.
Vacuum
When all of the gas particles are sucked out of a certain container.
Law of Refection
The ray that hits an object is the Incidence ray. The one that bounces off it is called the Reflected Ray. The is an imaginary line at 90 degrees in the middle of the two. This line is called the normal.
Convex Lens
A Convex Lens is converges light (reflects it inwards).
Frequency
The frequency of a wave is how many waves there are per second.
Ultrasound
When a sound is more than 20,000 Hz
Incident Ray
The initial ray that that hits a mirror.
Concave Lens
This lens bends light outwards.
Wavelength
The distance between the start of 2 waves.
Echo
When a sound waves bounces off an solid object.
Reflected Ray
The ray the is created of the reflection of an incident ray
Dispersion
When light travels through an object and spilts up into a spectrum (all the colours of the rainbow)
Transverse Wave
Light rays are displayed in this way.
