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6833206
Light
Description
its a summery for most light of light chapter
No tags specified
light
physics
cambridge igcse
Mind Map by
tabark th
, updated more than 1 year ago
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Created by
tabark th
almost 8 years ago
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Resource summary
Light
Reflecting light
Law of reflection
Angle of incidence=Angle of reflection
Incident ray , refracted ray and normal lie on the same plane
Image in a plane mirror
Result of reflection of light
Plane mirror: image with flat surface
It is Virtual Image
Ray Diagram ( Image formed characteristics )
Same size as object
The distance behind the mirror , same as distance infronte of mirror
Laterally inverted
Virtual
Light refraction
Bending of rays
Speed changes
Direction changes
Law of refraction
Sine i directly proportional to sine r
Incident ray ,refracted and normal lie on the same plane
Parallel sided block
Refractive index
Describe how ray of light slow down when enter new medium
No unit
Represented by (n)
n=c\v
speed of light in vacuum =3*10^8
Represented by (c)
The denser the medium the higher the refractive index
Snell`s law
Relates angle (i) and (r)
from air to another medium
n=sin i\sin r
from denser medium to air
n=sin r\sin i
Semi circular glass
critical angle
light travel from denser to rarer
i=c
r=90
Total internal reflection
Angle (i) greater than (c)
Light travel from denser to rarer
Total ,light 100% reflected
Total, happen inside the glass
Reflection,all light reflected
Critical angle and refractive index
The greater the refractive index the smaller the critical angle
Relating formula
n=sin90\sinc
Optical fibers
glass fibers
based on total internal reflection
Application
Telecommunication
In medicine (endoscope)
Media attachments
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69325959-2ed5-4247-a2f9-8c43fe378895.gif (image/gif)
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