light, light behavior, speed of light, index of refraction

light behaviors

reflection

refraction

n1sinangle1 = n2sinangle2

formula for snell's law of refraction

Ole Romer

danish astronomer (1644-1710)

discovered that light travels at a particular speed

it takes a certain amount of time for light to travel a particular distance

learned about this after observing that the time of an eclipse in one of jupiter's moons depend on its position from planet earth

how did danish astronomer ole romer discover light?

light

has a finite speed

3x10^8 m/s

speed of light

geometric optics

study of light using the light-ray model

light rays

used to trace the path of light

this is visualized as arrows

christiaan huygens

said light is a wave

reflection

bouncing off of light when it hits a surface

angle 1 = angle 2

law of reflection

types of reflection

specular reflection

diffused reflection

specular reflection

happens when light is reflected off from a SMOOTH surface

diffused reflection

happens when lights is reflection off from a ROUGH surface

refraction

happens when the light bends and passes through a different medium

index of refraction

n=c/v

n=index of refraction

c=speed of light in a vacuum

v=speed of light in that medium

vacuum - 1.000

air - 1.0003, approx 1.00

water - 1.33

diamond - 2.42

table of materials

snell's law of refraction

change in speed of light as it enters a different medium causes the light to bend or change its direction

true

true or false?

greater index of refraction decreases the angle,

bends the light ray towards the normal axis