Spherical mirrors, reflection, and refraction

Virtual image

The image formed when light only appears to diverge from point of image

Parabolic mirror

Mirror shaped like a parabola

Concave

________________ parabolic mirror

Convex

_______________ parabolic mirror

Real image

Image formed at point where rays actually meet

Plane mirror

Flat mirror

Specular

_____________ reflection

Diffuse

______________ reflection

Incident ray

Light ray that approaches surface

Reflected ray

Light ray that bounces off surface

Refraction

The bending of a wave as it passes at an angle from one medium to another

n1Sinθ1=n2Sinθ2

Snells law

Refraction index value

( n1Sinθ1=n2Sinθ2 )
n

C/V

(Refraction index)
n=

Speed of light

( n=CV )
C

Velocity (of light in medium)

( n=CV )
V

Total internal reflection

Complete reflection of light by the inside surface of a medium

Dispersion

The separation of light into its component wavelengths