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TOP FLAP: What are Light (EM) Waves?
TOP FLAP: What are Light (EM) Waves?
Reflection Test
Reflection Test
Angle of incidence: the angle of an incoming beam
Angle of reflection: the angle of a beam reflected off a surface
pg. 30-31 in FOSS: Waves textbook.
Refraction Test
Refraction Test
Setup 1: Aim the laser at the center point of the protractor sheet at a 10° angle of incidence toward the flat side of the cup. Record the angle of refraction in your notebook sheet and calculate the difference between the angle of incidence and refraction. Repeat with other angles to complete the data table for Setup 1.
Setup 2: Rotate the refraction dish so the laser beam is entering through the curved side. Complete the data table for Setup 2.
BOTTOM FLAP: What are Light (EM) Waves?
BOTTOM FLAP: What are Light (EM) Waves?
Brightness:
Brightness:
Also known as intensity, it increases(⬆) as energy increases(⬆) or as distance decreases (as you get closer to the light source).
Brightness of a an EM wave is determined by the amplitude of the wave.
Frequency:
Frequency:
Number of waves that pass in time. As frequency increases(⬆): energy increases(⬆) for EM waves. The frequency also determines the type of electromagnetic wave as shown in the EM spectrum. If the frequency changes, the wave will change, which explains a phenomenon called red shift in astronomy. More info in this article.
Speed of Light:
Speed of Light:
All light travels at 299,792,458 meters per second (m/s) in a vacuum, since all light travels at the same speed λ (wavelength) is used to distinguish the type of light.
Wavelength (λ)
Wavelength (λ)
Length of crest to crest as λ increases ⬆: energy decreases ⬇ for electromagnetic (EM) waves. Used to determine the type of electromagnetic wave.
generally the wavelength is measured from crest to crest, but it is the length of one wave pattern, it can be measured from trough to trough or from another point on the wave, as long as there is one full wave included.
Electromagnetic Spectrum
Electromagnetic Spectrum
pg. 33-41 in FOSS: Waves textbook.
Label and color in the electromagnetic spectrum diagram.
WORD BANK:
Top: gamma rays, infrared, radio, microwaves, ultraviolet, visible light, x-rays
Bottom: frequency/energy, wavelength
Check your EM Spectrum Diagram here
Check your Color of Objects
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