Light Waves
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Light wave
Electromagnetic wave Invisible to human eye (can see effects=sunburns)
Lights can be… (3)
Reflected Refracted Absorbed
Réflection
Rebounding of light when it hits another medium and bounces back from medium it came from
Specular reflection
Produces true mirror image Parallel incoming rays are reflected back parallel
Diffuse réflection
Light rays are reflected in many different directions
Images in mirrors…(3)
Same size Same distance in front and behind Opposite orientation
Réfraction
Light changes direction when it passes from one medium to another
Converging lense
Causes parallel light rays to come together (thicker middle, thinner ends= eye contacts)
Diverging lense
Causes parallel light to move apart
Focal point
Converging lense
Diverging lense
Notes Goes outwards
Real image
Can be projected onto screens ex; projector,camera
Virtual image
Cannot be captured on a reflective surface Image found by extending reflected rays