Flashcards in Light And Sound Deck (32):
The bending pf light rays as they slow down as they pass through a different medium.
A plane mirror is a mirror that is flat and reflects the light regularly.
Speed of light
Speed of light is 300,000,000 m/s
An echo is where you say something and you hear yourself again but further on in the big space because the speed of sound isn't fast enough to be in those two places at once
An area (such as space) that has nothing in it not even air
A medium is any material of a solid, liquid or gas
Is a wave/ray that is reflected of something such as a mirror.
Is a ray which is pure and not reflected.
Speed of sound
In a gas: 340m/s
In a liquid:1530m/s
In a solid:5920m/s
Peak/crest & trough
The peak/crest is the maximum upward distance of the wave from the centre. The trough is the opposite and is the maximum distance below the wave.
Pitch is the rate at which vibrations are produced, hertz per second.
Short di cave. Fixes Short sighted. Diverge. Concave.
Fixes long sighted. Converges.
Specular reflection is when the wave is reflected of a smooth surface such as a mirror or calm water.
Is when the wave is reflected of a bumpy surface such as a table or the floor and all the waves go in multiple directions.
The wavelength is the distance between two peaks of the wave.
The frequency is how fast the wave vibrates or goes up and down.
The cornea is the transparent front part of the eye that covers and protects the inside.
the retina receives light and converts them into signals which it sends to the brain.
The lens refracts light rays so that they form a clear image at the back of the eye
20 to 20,000 Hz
White light can be split up using a prism to form a spectrum. A prism is a block of glass with a triangular cross-section. The light waves are refracted as they enter and leave the prism. The shorter the wavelength of the light, the more it is refracted. As a result, red light is refracted the least and violet light is refracted the most, causing the coloured light to spread out to form a spectrum.
An oscillation is a motion that repeats itself in a regular cycle
The lens refracts the light into the retina
Waves are the transport of energy without the transport of matte
When something bounces off something and back again
the separation of white light into colours according to wavelength.
Angle of refraction
The angle between the normal line and the line after it switches medium
the distance from the centre line to the top of a crest or to the bottom of a trough.
Law of reflection
The reflected ray is at the same angle ad the same a gle as the incident ray