light Flashcards
how does light travel?
in straight lines
how do you measure the angle of incidence?
measure between the incident ray and the normal
whats is the angle of reflection equal to?
the angle of incidence
what is refraction?
When light passes from one medium to another medium with a different density and its speed changes
what happens as light enters glass towards the normal?
as the ray leaves the glass it will bend away from the normal.
what lense used for short sightedness and why?
concave because it converges the light into focus
what lense used for long sightedness and why?
convex because it diverges the light away into another direction
what is dispersion?
the separation of visible light into its different colours
Whats TIR?
when all the ray of light is totally reflected inside of the prism
