EM spectrum Flashcards
the order of the EM spectrum from low frequency to high frequency?
radio, micro, infrared, visible, UV, X-rays and gamma rays
what is the order of the EM spectrum in order of increasing wavelength?
gamma, x-rays, UV, visible, infrared, micro, radio
red….
monkeys in vietnam use xylophones greatly (low frequency-> high frequency)
can EM waves travel through a vacuum?
yea
are EM waves transverse or longitudinal?
transverse
EM waves travel at what speed?
3 x 10 to the power of 8 m/s
what are the uses of radio waves?
TV and radio communication and astronomy
what are the uses of microwaves?
satellite TV and mobile phones and also heating food
what are the uses of infrared?
heat cameras, close- range heating
what are the uses for visible light?
vision, photography and optical fibres
what are the uses of UV rays?
tanning beds, security marking
different wavelengths of light as different colours from longest wavelength to shortest wavelength?
red, orange, yellow, green, blue, indigo, violet
different wavelengths of light as different colours- from highest frequency to lowest frequency
violet, indigo, blue, green, yellow, orange, red
uses of X rays?
medical screening and security screening
uses of gamma rays?
sterilising food and medical equipment
what are the dangers of microwaves?
internal heating of body tissue
what are the dangers of infrared?
skin burns
what are the dangers of ultraviolet?
damage to surface cells and blindness
what are the damages of gamma rays?
cancer and mutation of cells
what can be used to protect against the effects of infrared radiation?
insulating materials
what is used as a protective measure to reduce exposure to UV?
suncream
what can you do to reduce the risk of gamma rays?
wear LED clothing
how can you avoid the effects of infrared waves?
using shiny silvery surfaces such as aluminium
