EM RADIATION
Electromagnetic radiation travels through space in the form of these.
Electromagnetic waves.
What Greek letter represents wavelength?
It is called lambda.
What is the only part of the electromagnetic spectrum that humans can see?
Visible light.
What is the relationship between wavelength and frequency?
They have an inverse relationship.
What happens to the frequency of a wave when its wavelength becomes shorter?
The frequency increases.
True or False: Electromagnetic radiation needs matter to travel through.
False.
What Greek letter represents frequency?
It is called nu.
Which color has the longer wavelength: red or violet?
Red.
Wave A has a wavelength of 700 nm.
Wave B has a wavelength of 400 nm.
Which wave has the higher frequency?
Wave B.
Wave A has a wavelength of: 2.00 x 10-6 m
Wave B has a wavelength of: 4.00 x 10-7
Without calculating, which wave has the higher frequency? Explain why.
Wave B has the higher frequency.
Wave B has the shorter wavelength:
4.00x10-7m < 2.00 x 10-6m
What is the speed of light in a vacuum?
c=3.00 x 108m/s
If the wavelength of electromagnetic radiation increases, what happens to its frequency?
The frequency decreases.
Put these in order from lowest to highest frequency:
X-rays — Radio waves — Visible light
Radio waves → Visible light → X-rays
Which type of electromagnetic radiation has the longest wavelength and lowest frequency?
Radio waves.
Higher frequency means ______ photon energy.
Higher.
What are the two ways that light can behave?
As a wave and as a particle.
Calculate the frequency of light with a wavelength of: 5.00 x times10-7 m
6.00 x 1014 Hz
Which has more energy per photon: ultraviolet radiation or infrared radiation? Why?
Ultraviolet radiation.
A light wave has a wavelength of:6.00t x 10-7m
Calculate its frequency.
5.00 x 1014 Hz
Which carries more energy per photon: visible light or X-rays?
X-rays.
Explain why the statement “All electromagnetic radiation is dangerous” is false.
Different types of electromagnetic radiation have different frequencies and energies.
Light has a frequency of: 7.50 x 1014 Hz
4.00 x 10-7m
Put these in order from lowest to highest energy per photon:
Gamma rays — Microwaves — Radio waves — Visible light — X-rays
Radio → Microwave → Visible → X-ray → Gamma
Two electromagnetic waves are traveling through a vacuum.
Wave A: nu=3.00 x 108 Hz
Wave B: nu=6.00 x 1014 Hz
Which wave travels faster?
Neither. They travel at the same speed.
Explain in your own words: 'Higher frequency = higher photon energy.'
As the frequency of electromagnetic radiation increases, each photon carries more energy.