University:
Winston-Salem Forsyth County Schools
Course:
AP Physics I
Academic year:

2014
Views:

157

Pages:

1
Author:

Marley Meyer

SOUND and LIGHT UNIT VOCABULARY UNITS OF MEASURMENT hertz- the unit of measurement used to determine pitch decibels – the unit of measurement used to determine loudness WAVES transverse wave – when particles move in an up and down motion; light waves longitudinal wave – when particles move in a back and forth motion; sound waves seismic waves – waves made by the movement of energy through the earth’s layers; caused by earthquake and volcanic activity crest – the highest point of a longitudinal wave trough – the lowest point of a longitudinal wave wavelength – the measurement of distance between two identical points frequency – the number of waves in a given amount of time compression – a region where wave particles are bunched together rarefaction – a region where wave particles are farther apart LIGHT reflection – bouncing off a surface refraction – the bending of light when it passes through different mediums angle of incidence – the angle at which light hits an object visible spectrum – the portion of the electromagnetic spectrum which humans are able to see transparent – light can pass through translucent – some light can pass through opaque – no light passes though SOUND oscillate – back and forth movment in the direction that the wave is travelling echo – a reflection of a sound wave that hits a surface it cannot pass through pitch – the number of times an object vibrates per unit of time