electromagnetic spectrum. Flashcards
what are the colours of the rainbow in the correct order?
red.
orange.
yellow.
green.
blue.
indigo.
violet.
which colour has the longest wavelength?
red.
what are the properties of the colour red?
relaxed, low frequency, long wavelength.
what are the properties of violet?
violent, high frequency, short wavelength.
what is it called when white light splits into different colours?
dispersion.
what does a temp increase indicate when shining a white light through a prism?
must be energy but can’t be seen so must be infer red.
what is visible light in relation to the em spectrum?
part of the spectrum humans can detect.
what is the range of wavelength for visible light?
0.0004 and 0.0007mm.
what are all the properties of waves on the em spectrum?
all em waves are transverse waves.
transferer energy from one place to another.
can travel in a vacuum.
travel at the speed of light.
be reflected and refracted.
what does it mean that all em waves are transverse waves?
the vibration causing the wave is perpendicular to the direction that the energy moves.
why can they travel in a vacuum?
don’t need particles.
what is the speed of speed of light?
300000000m/s.
what is the evidence for energy transfer in: x-rays, feeling warm in the sun, seeing light, skin cancer?
feel warm- infer-red waves must transfer energy.
can see light so must transfer energy.
skin cancer- ultra-violet waves must transfer energy.
x-rays- change colour of photographic film to produce an image.
define absorb.
energy is taken in by a material as it tries to passthrough it.
define transmit.
allow energy to pass through a material.
