Sound And Light Flashcards
Plane mirror
A mirror with a flat reflective surface
Specular reflection
A exact reflection image
Refraction
The bending of light waves when they slow down when they go through a different medium example through glass.
Diffuse scattering
Reflection from a rough surface
Law of reflection
The law of reflection says that the incident ray is always equal to the ray of reflection.
Reflected ray
The reflected ray is the ray of light that is reflected from the mirror , it is always equal to the ray of incidence.
Refracted ray
The refracted ray is the ray that is refracted.
Angle of refraction
The angle made by the refracted ray
Medium
Any substance eg: air, glass ect
Cornea
The cornea is the piece of skin protecting the pupil and the lens.
Lens
The lens is the part in your eye which is see through, the image is upside down but your brain flips it round.
Retina
The part in your eye which sees colour
Convex lens
A lens that converges the image, you use it when you are long sited
Concave lens
A lens that diverges the image, you use it when you are short sited
Dispesion
The dispersal ( splitting ) of white light into colours of the spectrum. This is due to the reflection in which each colour travels at different speeds.
Spectrum
The dispersion of white light into all colours that create it.
Wave
An oscillation that transfers energy
Peak/crest
The highest point in a wave
Oscillation
The movement up and down in a wave
Pitch
The pitch is determined by frequency
Amplitude
How loud it is or how far the peak or the trough is from the middle
Frequency
How many waves go past a point in a second
Wave length
The distance between two waves
Transverse wave
In a transverse wave the oscillation is at 90 degrees to the direction of the wave
Longitudinal wave
In longitudinal waves they move parallel to the direction of the wave
Speed of light
The speed of light is 299 792 458 m / s
The speed of sound
The speed of sound is 343 m / s in dry air
The speed in water is 1450-1498 m / s
The speed in steel is 5920 m / s
The audible range
The audible range is how loud or quiet you can hear
Vacuum
A vacuum is when their is no particles in somewhere for example space
Ultra sound
Ultrasound is any sound above 20,000 Hz ( above the human audible range of hearing )
Echo
An echo is a reflected sound wave caused by reverberation
Reverberations
A reverberation is caused by a reflected sound
