light

what is the normal line

an imaginary line, perpendicular to the object the light is travelling through and where it hits it

which way does light refract when the object it’s travelling trough is denser

towards the normal line

which way does light refract when light travels through a less dense object

away from the normal line

what is the calculation of Snell’s law

how do you use Snell’s law

what are the propreties of reflection

angle 1 = angle 2

what is the critical angle

the angle at which the light only reflects and doesn’t refract

—> if the angle of incidence is bigger than the critical angle, it only reflects

what is the order of the dispersion of light

-Red

-orange

-yellow

green

-blue

-indigo

-violet

why do colours disperse when refracting

because hot colours have a lower frequency than cold colours

what are the propreties of a this ray diagram

the image is :

-inverted

-larger

real (projection onto a screen)

what are the propreties of this ray diagram

the image is:

-virtual

-upright

magnified

what does this diagram show

the optical images by mirrors

focal point and length

what is the density of air

3 × 10⁸ m/s