Electromagnetic spectrum basics and Scientific Notation
What is the range of visible light?
400-700 nm
what are the rules for scientific notation?
Exponent Number between 1.0-9.9 Multiply by 10 (base)
What do you put if there is no exponent? (1.23 x 10^?)
Put a zero
If there is an abnormal amount of zeros what do you do? (Ex. 10^-42)
Write the exponent number - 1 zero (41 zeros)
cell phone is an example of?
microwaves
What is the electromagnetic spectrum?
A range/variety of wavelengths/particles
How is the electromagnetic spectrum different from radioactive particles?
Don't need a medium to travel
lamp used to warm a baby chick is an example of?
Infrared waves
What does the calculator automatically put your answer in?
decimal notation
If the decimal moves to the right then it is
negative
What waves can be used to communicate with satellites?
radio waves/microwaves
Examining the inside of a weld in a steel oil pipe is an example of
x rays
what is the constant equal to?
3 x 10^8 m/s = 300,000,000
If the wave has chaarcteriscs of more than one wave, what is it considered?
An -ish, ex. radio-microish
What is light classified as due to electrical and magnetic fields vibrating in a light wave?
Electromagnetic radiation/ radiant energy
Microwaves are a type of infrared waves
F, microwaves are a type of electromagnetic radiation
Radio waves, microwaves and ultraviolet waves all have longer wavelengths than visible light
False, they have longer wavelengths than visible light
x rays have more energy than gamma rays
False. Gamma rays have more energy than x rays
What do microwaves do to heat up food?
Heats up the water molecules within the food; vibrates water molecules
What spreads out from it's source in all directions?
Radiant energy
Types of waves
Radio waves, microwaves, infrared, visible light, ultra violet light, x-ray, and gamma
What does "spectrum" mean?
Range, variety, "-ish" there is blending of things, not specific
What goes at the speed of light?
Waves/particles
Does sound need a medium to travel?
Yes, air
What is the relationship between frequency and energy?
direct (short waves = more energy)
What its the range of the EMS?
distances in space - cells
Microwaves are one type of?
electromagnetic radiation/radio waves
Electromagnetic radiation includes only visible light waves
false, includes all of the electromagnetic spectrum (7)
Communicating with satellites is an application of gamma rays
false, radio waves
compared to all the other types of electromagnetic radiation, radio waves have the lowest
frequency
Because ____ have the highest energy of all electromagnetic radiation, they are the most damaging to human tissue
gamma rays
Used by an oncologist (a physician who studies and treats cancer)
gamma rays
What is the relationship between wavelength and energy?
indirect (longer wavelength = less energy)
What is the heat radiation that cannot be seen by your eyes but be felt by your skin?
infrared rays
What is the relationship between wavelength and frequency?
inverse (long waves = lower frequency)
Can you get rid of zeros after a number?
no
What is frequency?
number of waves per second
if the decimal moves to the left then it is
positive
measuring the speed of a passing car is an example of?
radar
What is the energy that travels by radiation, an example being light?
radiant energy/ electromagnetic radiation
TV broadcast signals are an example of?
radio waves
order of EMS lower -> high
radio waves, microwaves, infrared waves, visible light, ultraviolet rays, x rays, gamma rays.
What represents different forms of electromagnetic radiation?
the electromagnetic spectrum
Both X rays and gamma rays have higher frequencies than ultraviolet rays.
true
Radiant energy spreads out from its source in all directions
true
The Sun radiates both visible energy and invisible energy.
true
an overexposure to what can result in sunburns/skin cancer?
ultraviolet light
In a hospital to keep surgical equipment sterile is an example of?
ultraviolet waves
What does it mean if your exponent is positive?
your number is greater than one
What does it mean if your exponent is negative?
your number is less than one