Electromagnetic spectrum

electromagnetic spectrum

the arrangement of electromagnetic waves according to their wavelengths and frequencies

7 types of energy that make up the electromagnetic spectrum from largest wavelength to shortest wavelength

radio waves, microwaves, infrared, visible light, ultraviolet light, x-ray, gamma rays

how fast to electromagnetic waves travel?

the speed of light

what is the speed of light

300,000 km/s

how does light behave according to Sir Isaac Newton

as waves or particles

how does a prism show that visible light is made up of many different wavelengths

it bends the light and the colors are separated in order of wavelength

which color of light has the longest wavelength

red

what is the wavelength of red light

700 nm

which color of light has the shortest wavelength

violet

what is the wavelength of violet light

400 nm

spectroscopy

the study of the properties of light that depend of wavelength

what can a star’s spectrum tell astronomers about the star

it’s elements and chemical composition

what is the range in size of visible light

400 - 700 nm

what are two ways that microwaves are used in common places

shortwave communication and microwave ovens

which radiation type(s) is found in supernova remnants

x-rays, ultraviolet light, radio waves

which radiation type(s) is found when nuclear reactions are produced

gamma rays

which radiation type(s) is found in galaxies

microwaves, x-rays

which radiation type(s) is cosmic background radiation

microwaves

element

a pure substance made of atoms that are all of the same type

how many naturally occurring elements are there

90

what element gets fused into what other element in a star’s core

hydrogen into helium

what happens during a supernova

stars release very large amounts of energy and neutrons which allows heavier elements than iron to be formed such as uranium and gold

first FOUR elements

hydrogen, helium, lithium, beryllium

as frequency increases wavelength does what

decreases

as frequency increases energy does what

increases

what is the relationship between frequency and wavelength

inverse

what are radio waves used for

radar, sending sound, cell phones

what is infrared used for

finding people in the dark, remotes

what is the only radiation we can see

visible light

what can too much ultraviolet light do

cause sunburn and skin cancer

why do we need ultraviolet light

vitamin D

what are x-rays used for

look at solid structures like bones and bridges and for cancer treatment

how can you stop gamma rays

with a 3-4 foot concrete wall