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Physics light reflection and refraction
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Definition: Regular and Diffused reflection
bouncing of light off the surface.
angle of incidence is always equal to angle of reflection when light falls on a smooth surface. A regular reflection is produced.
incident ray, reflected ray and normal lies on the same plane
Regular reflection
clear and undistorted
diffused reflection
light falls on a rough surface and light is bounced off in different angles
Image formed by a plane mirror
upright
same size
laterally inverted
object distance is equal to image distance
virtual
eg. side mirrors and periscope
Convex mirrors
curves outwards
make things look smaller
eg, blind corner mirror
Concave mirrors
curve inwards
make things look bigger
eg cosmetic mirrors, microscope
Definition: Refraction
bending of light as it passes from one medium to another
Less dense to denser (air to water)
Speed slows on, thus refracted ray bend towards normal
denser to less dense (water to air)
speed of light speeds up thus, refracted ray bends away from normal
snells' law (to find out refractive index or angles)
n
refractive index of incident medium
sin i
incident angle
= n
refractive index of refracted medium
sin r
refracted angle
to remove sin
multiply sin
-1
to the other side
Author
nicolehwj
ID
38403
Card Set
Physics light reflection and refraction
Description
Physics light reflection and refraction
Updated
2010-09-29T17:10:12Z
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