A
Thought light came from our eyes (like flashlight beams). ❌ Wrong, because then we’d see in the dark!
Pythagoras
Zoom in on tiny things like bacteria. Helped start microbiology.
Microscope
Light is also made of tiny bits called photons. This is called light ________
Particles
Angle of Incidence =
Angle of Reflection
What is the actual Speed of Light?
~300,000 km/s
This part of the eye allows you to See color and details
cones
Discovered the Law of Reflection: light bounces at equal angles.
Euclid
Help us see stars and planets. Discovered moons, craters, etc.
Telescope
Light goes through (like glass).
transparent
Curves in; spreads light.
Concave lens
Where light rays meet is called..
These items can fix focusing problems (myopia, hyperopia, astigmatism)
glasses or contacts
Found that light bends when it passes from air to glass.
Ptolemy
This type of telescope Uses lenses
Refracting telescope
Some light passes, but blurry (like frosted glass).
Translucent
Curves out; focuses light.
Convex lens
Part of the eye that Focuses light
lens
What types of electromagnetic radiation are used in medicine?
XRays, gamma rays, UV Radiation, Infrared radiation, Radio waves (MRI)
Proved that light comes from objects to our eyes (not the other way around).
Al-Haytham
This type of telescope Uses mirrors
reflecting telescope
No light goes through (like wood).
Opaque
What Splits white light into colors.
prisms
The black dot in the eye that lets light in.
Pupil
How are fluorescent and incandescent light sources different?
Incandescent lights use heat to produce light, while fluorescent lights use electricity to excite a gas that then produces UV radiation, which in turn excites a phosphor to emit visible light.
Used prisms to show white light is made of all the rainbow colors (ROYGBIV)
Isaac Newton
Use prisms to magnify distant things like birds or the moon.
Binoculars
Light bouncing back is called
reflection
Height of the wave. is called
amplitude
This part of the eye Controls how big the pupil is
Iris
REd, Green, Blue
primary colors of light
First to measure the speed of light (in 1676).
Ole Romer
What are the 4 properties of light?
Travels in a straight line (unless something bends or reflects it). Can be absorbed – like dark colors absorbing heat.
Can be reflected – like mirrors.
Can be refracted – light bends in water or glass.
Light bending in water or glass is called
refraction
Distance between wave peaks is called..
wavelength
“Screen” at the back of the eye.
retina
cyan, magenta, and yellow
Secondary colors of light
Measured light speed more accurately: about 300,000 km/s.
Michelson
Light moves up and down like ripples. This is called...
waves
Incoming light is called
Incidence Ray
How fast waves pass is called...
Frequency
The part of the eye that allows you to See in the dark, no color
Rods
Special cells in the back of your eye (in the retina) that detect light.
photoreceptor