Waves (P6) Flashcards
do waves differ from vacuum to air
they do not
in which direction (relative to the normal lines) do waves refract when entering a denser medium
it bends towards the normal
where do gamma rays come from
they originate from the nuclei of a cell
health effects of ultraviolet waves
increased chance of skin cancer
skin aging more rapidly
what are transverse waves
what are longitudinal waves
waves where oscillations are perpendicular to the direction of engery transfer
waves where oscillations are parallel to the direction of engery transfer
2 examples of transverse waves
2 examples of longitudinal waves
seismic S- waves, sound
seismic P- waves, elctromagnetic
health effects of x-rays and gamma rays
3 uses of infared radiation
2 uses of microwave radiation
2 uses of radiowaves
cooking food, electrical heaters, theraml/infared cameras
cooking food, satellite communications
television tranmission, radio transmission
what is a period
time taken for a full wave to pass
what is the pitch when the frequency is high
what is the sound when the amplitude is tall
high
loud
draw the 2 main parts of longitudinal waves
what is a waves amplitude
what is the wavelength
resting point to peak, resting point to trough / maximum displacement of point on wave from undisturbed postition
peak of one wave to the next adjacent peak, same with the trough
what colour is an object if all wavelengths are absorbed
black
how does a red colour filter work
the filter absorbs all the colours that are not a red hue then lets only the red colour come through
what is the focal length of a lens
