Light

A from of energy

speed=3x10 8 m/sec

Travels in straight lines

Reflect-when hits a surface

refract-when change speed

defects of vision-people with normal vision see sharp and clear images .cannot focus the eyeliner properly;they see thins blurry

limatations

magnifying glass,microscope,telescope,binocular,ultrasound scanning device,x-ray machine,MRI,Periscope

convex

concave

Incident ray-the ray go light that hits the surface

reflected ray-tye ray of light that reflects from the surface

Angle of reflected-Angle between the normal and the reflected ray

Angle of incident-angle between the incident ray and the normal.

Normal-perpendicular to the surface at the point of incidence

can see 7 different thicknesses of the glass=different light speeds.Rainbow in natural light dispersion where water droplets acts as small prisms.

whenlight rays hit a n object - some of the light bounces back. we can see object when the reflected light enters our eyes.