Waves Flashcards
What is a phase
Measure of where one wave is in relation to another
What is interference
When two waves meet and they combine
What waves combine to create constructive interference
In phase waves
What waves combine to create destructive interference
Out of phase waves
Interference is evidence for _____
The wave model of light
Interference is how we measure ______
Waves
What is a coherent source
Produce waves of the same frequency, wavelength, velocity and phase difference
Maximum =
Two in phase waves meeting
Properties of a prism
Red is the least diffracted
Only one spectrum
Image is bright
Properties of a grating
Red is diffracted the most
More than one spectrum
Spectra are less intense
What is refraction
The slowing of light as it passes from a less dense to a more dense optical medium. (Air->glass)
What is the absolute refractive index
Speed of light in one medium compared to the speed of light in the other medium
What is irradiance
A measure of the radiation falling on a surface
(Power per square metre)
