Download - Electromagnetic spectrum
Electromagnetic spectrum
Visible light
Visible light
λ ≈ 700 nm λ ≈ 420 nm
Ultraviolet waves
λ ≈ 700 - 420 nm
Ultraviolet waves
λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm
X-rays
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
X-rays
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
Gamma rays
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
Gamma rays
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nmλ ≈ 10-12 - 10-14 m
Infrared waves
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
Infrared waves
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
Microwaves
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
Microwaves
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
λ ≈ 10-2 - 10-3 m
Radio waves
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
λ ≈ 10-2 - 10-3 m
Radio waves
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
λ ≈ 10-2 - 10-3 m
λ ≈ 10-1 - 103 m
Electromagnetic spectrum
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
λ ≈ 10-2 - 10-3 m
λ ≈ 10-1 - 103 m
Electromagnetic spectrum
Long Wavelength
Short Wavelength
Electromagnetic spectrum
Long Wavelength
Short Wavelength
Low Frequency
High Frequency
What do they all have in common?
λ ≈ 700 - 420 nm
λ ≈ 10 – 100 nm
λ ≈ 1 – 0.01 nm
λ ≈ 10-12 - 10-14 m
λ ≈ 10-4 - 10-6 m
λ ≈ 10-2 - 10-3 m
λ ≈ 10-1 - 103 m
What do they all have in common?
• They can travel in a vacuum• They travel at 3 x 108m.s-1 in a vacuum (the
speed of light)• They are transverse• They are electromagnetic waves (electric
and magnetic fields at right angles to each oscillating perpendicularly to the direction of energy transfer)
Mini-book
Mini-book
• One type of EM wave for each page
• Each page should contain the wavelength and frequencies
• Each page should contain uses and other interesting information (including dangers)
• Attractive to look at (and funny?)
• Homework due Friday 29th January
Mini-book
• Finish for homework.
• Due Friday 29th January