'bye 'bye
Waves transfer ______, but do not transfer _______ .
energy matter
on a drawing of a wave, what is the top of the wave called ?
the crest or peak
define the term "normal" [as related to reflection & refraction]
a line drawn perpendicular to a reflecting or refracting surface at the point where a ray of light strikes it.
It serves as the reference line for measuring the angles of incidence, reflection, and refraction.
define the term "refraction"
a change in direction of a light ray passing from one medium to another.
If a wave slows down, its wavelength will _________________________
decrease.
When there is no energy in a wave it is shown as a straight horizontal line.
This is called the ____ position.
rest
what does the word amplitude mean ? NOT what does it look like on a drawing.
the maximum displacement of a wave from its resting position.
Amplitude is a measure of the energy in a wave.
How is the angle of incidence measured ? [don't say "with a protractor"]
at the surface of the mirror, measure the angle from the normal to the incident ray
Complete this sentence: When light travels from a less dense medium into a more dense medium, the light bends ________________________________ the normal.
toward
complete the formula for wave speed:
wave speed =
wave speed = frequency X wavelength
How is amplitude measred on a wave ?
From the resting position to the peak or trough.
on a drawing of a wave, what is the lowest point called ?
the trough
How is the angle of reflection measured ? [don't say "with a protractor"]
at the surface of the mirror, measure the angle from the normal to the reflected ray
When white light [visible light] passes through a prism, the light is separated into its constituent colors.
Which color of visible has the shortest wavelength ?
violet
red has the longest wavelength
When light enters a more optically dense medium, its wavelength ____________________________ because its speed ________________ , while its frequency remains constant
decreases
decreases
The waves approching a shore have a wavelength of 1.2 cm mand a frequency of 8.0Hz.
Calculate the speed of the waves.
speed = 1.2 x 8 = 9.6 cm/s
what is [one] wavelength ? i.e. How is wavelength measured ?
Wavelength is the spatial distance between two consecutive corresponding points of the same phase in a wave, such as from crest to crest or trough to trough.
Complete this sentence:" The agle of relection ......................................"
The agle of relection equals the angle of incidence.
Complete this sentence: When light travels from a more dense medium into a less dense medium, the light bends ________________________________ the normal.
away from
What unit is used for frequency ?
hertz [Hz]
what is an "oscillation"
a vibration / moving back & forth
Define the term "frequency [related to waves]. Be very specific.
- the number of waves passing a point each second.
Complete this sentence: The characteristics of an image produced by a plane mirror are:
1) the object and the image are .............................
2) the object and the image are ..............................
3) the image is .....................................
1) the object and the image are the same size
2) the object and the image are the same distance from the mirror
3) the image is laterally inverted
State the name of the effect that produces a spectrum from white light when the light is refracted through a prism.
dispersion
What is the speed of a wave that has a frequency of 50 Hz and a wavelength of 6 m?
speed = frequence X wavelength
speed = 50Hz x 6m
speed = 300 m/s