Waves Flashcards
Refracation
Refraction is the bending of light when it slows down and hits another medium.
Speed of sound
The speed of sound is around 340 m/s in gas, 1500 m/s in liquid and around 5000 m/s in a solid.
Vacuum
A vacuum is a machine that sucks all of the gas particles out of a container to make the thing inside it silent.
Cornea
The cornea is a part of the eye that refracts light as it enters the eye through the pupil.
Lens
The lensrefracts entering light to focus it onto the retina where the light needs to meet.
Retina
The retina is a part of the eye that contains light receptors which trigger electrical impulses to be sent to the brain when light is detected.
Convex lens
A convex lens refracts the light to meet at the retina. People need a convex lens if the light meets behind the retina. This person is long sighted
Concave lens
A concave lens diverges the refracted light to make it meet at the retina. People need a concave lens if the light meets before the retina. This person is short sighted
Peak
The peak or crest is the top of a sound wave
Reflected ray
A reflected ray is a ray that shines on an object but then shines of the object and somewhere else
Frequency
Frequency is how many waves are displayed per second
Amplitude
Amplitude is the measurement from the crest to the middle
Transverse waves
The oscillations are at right angles to the direction of travel and energy transfer
Ultrasound
Ultrasound sends frequencies greater than 20000Hz. It sends waves into the body and it reflects of and object and gets displayed onto a screen. Doctors use this during pregnancy
Echo
An echo is the reflection of sound bouncing off of a solid and coming back to you.
Wave
A wave is a vibration through air particles to make sound so that it can be heard.
Pitch
The pitch of a sound is how hight or how low the sound is.
Reverberation
Reverberation is the return or bounce back of an echo.
Incident ray
The incident ray is the light that is shining on the surface/ the light that hits it first.
Wave length
The distance until the waves shape repeats its shape.
Dispersion
The separating of light when they split into different colours.
Speed of light
The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour.
Spectrum
The band of colours produced by separation of light by their different degrees of refraction.
Longitudinal wave
A kind of wave that vibrates in the direction of propagation.
Law of reflection
The law of reflection states that the incident ray and the normal to the surface of the mirror all lie in the same plane.
Medium
A substance that makes it possible to hear waves by providing particles for vibration.
Angle of refraction
The amount of appeared bending there is when the light is refracted.
Diffuse scattering
It is the scattering that arises from any departure of the material structure from that of a perfectly regular lattice.
Specular reflection
It is the mirror like reflection of light from a surface.
