light

luminous

emit visible light
e.g sun

non luminous

dont emit light
seen by reflecting light
e.g tennis ball

Transparent

light passes through, no energy lost

Translucent

scatter light as it passes through

opaque

light bounces or absorbs

reflect

light bounces off, following the law of reflection

scatter

light spreads out in different directions after hit surface

absorb

when light is soaked up, emitting heat energy

law of reflection

the angle of incidence is equal to the angle of reflection

virtual images

Images formed in the virtual world, cant touch but still exist.
Can’t be captured on screen or directly on film
All mirrors=virtual image

real image

can be touched

regular reflection

smooth surface → light reflected in parallel → shiny and clear

diffuse reflection

rough surface → light scattered in different direction → not shiny and clear

Cancave

parallel light rays reflect towards focal point

Convex

parallel light rays reflect outward